2020 United States state legislative elections

2020 United States state legislative elections

← 2019 November 3, 2020 2021 →
86 legislative chambers 44 states
Party Republican Democratic Coalition Chambers before 59 39 1[a] Chambers after 61 37 1[a] Overall change 2 2
Map of upper house elections:      Democrats retained control      Republicans gained control      Republicans retained control      Non-partisan legislature      No regularly-scheduled elections
Map of lower house elections:      Democrats retained control      Republicans gained control      Republicans retained control      Coalition retained control      Non-partisan legislature      No regularly-scheduled elections

The 2020 United States state legislative elections were held on November 3, 2020, for 86 state legislative chambers in 44 states. Across the fifty states, approximately 65 percent of all upper house seats and 85 percent of all lower house seats were up for election. Nine legislative chambers in the five permanently-inhabited U.S. territories and the federal district of Washington, D.C. also held elections. The elections took place concurrently with several other federal, state, and local elections, including the presidential election, U.S. Senate elections, U.S. House elections, and gubernatorial elections.

Prior to the elections, Democrats held 15 trifectas (control of the governor's office and legislative chambers), Republicans held 21 trifectas, and 14 states have a divided government. Nationwide, Republicans controlled approximately 60 percent of the legislative chambers and 52 percent of the legislative seats.^[1] These elections had a major impact on the 2020 redistricting cycle, as many states held their final legislative elections prior to the decennial drawing of new congressional and state legislative districts.

Due to the impact the redistricting cycle will have on partisan control of Congress and state legislatures, the Democrats, who had not been in control of a majority of state legislatures across the U.S. since 2010, had hoped to retake control of key chambers in advance. However, despite fundraising efforts and projections of several Republican-held chambers in competitive states flipping, the Democrats failed to flip any state chambers, which they attributed to gerrymandering in the wake of the 2010 elections, as well as state laws restricting voting, President Donald Trump being on the ballot, and the Democrats' campaigning methods. In fact, Republicans flipped both chambers in the New Hampshire legislature.^[2][3][4][5]

Following the election, Republicans controlled redistricting in 20 state governments, totaling 188 House districts, whereas Democrats had control in states with a total of 73 districts.^[6] Overall, these elections saw the fewest partisan changes in state legislatures since 1944.^[7]

Regularly scheduled elections were held in 86 of the 99 state legislative chambers in the United States. Nationwide, regularly scheduled elections were held for 5,876 of the 7,383 legislative seats. Many legislative chambers held elections for all seats, but some legislative chambers that use staggered elections held elections for only a portion of the total seats in the chamber.^[8] The chambers not up for election either hold regularly scheduled elections in odd-numbered years, or have four-year terms and hold all regularly scheduled elections in presidential midterm election years.

Note that this table only covers regularly scheduled elections; additional special elections took place concurrently with these regularly scheduled elections.

State	Upper House[8]				Lower House[8]
	Seats up	Total	% up	Term	Seats up	Total	% up	Term
Alabama	0	35	0	4	0	105	0	4
Alaska	10	20	50	4	40	40	100	2
Arizona	30	30	100	2	60	60	100	2
Arkansas	17	35	49	2/4[b]	100	100	100	2
California	20	40	50	4	80	80	100	2
Colorado	18	35	51	4	65	65	100	2
Connecticut	36	36	100	2	151	151	100	2
Delaware	11	21	52	2/4[b]	41	41	100	2
Florida	20	40	50	2/4[b]	120	120	100	2
Georgia	56	56	100	2	180	180	100	2
Hawaii	13	25	52	2/4[b]	51	51	100	2
Idaho	35	35	100	2	70	70	100	2
Illinois	20	59	34	2/4[b]	118	118	100	2
Indiana	25	50	50	4	100	100	100	2
Iowa	25	50	50	4	100	100	100	2
Kansas	40	40	100	4	125	125	100	2
Kentucky	19	38	50	4	100	100	100	2
Louisiana	0	39	0	4	0	105	0	4
Maine	35	35	100	2	151	151	100	2
Maryland	0	47	0	4	0	141	0	4
Massachusetts	40	40	100	2	160	160	100	2
Michigan	0	38	0	4	110	110	100	2
Minnesota	67	67	100	2/4[b]	134	134	100	2
Mississippi	0	52	0	4	0	122	0	4
Missouri	17	34	50	4	163	163	100	2
Montana	25	50	50	4	100	100	100	2
Nebraska	25[c]	49[c]	51[c]	4	N/A (unicameral)
Nevada	10	21	48	4	42	42	100	2
New Hampshire	24	24	100	2	400	400	100	2
New Jersey	0	40	0	2/4[b]	0	80	0	2
New Mexico	42	42	100	4	70	70	100	2
New York	63	63	100	2	150	150	100	2
North Carolina	50	50	100	2	120	120	100	2
North Dakota	23	47	49	4	47	94	50	4
Ohio	16	33	48	4	99	99	100	2
Oklahoma	24	48	50	4	101	101	100	2
Oregon	15	30	50	4	60	60	100	2
Pennsylvania	25	50	50	4	203	203	100	2
Rhode Island	38	38	100	2	75	75	100	2
South Carolina	46	46	100	4	124	124	100	2
South Dakota	35	35	100	2	70	70	100	2
Tennessee	16	33	48	4	99	99	100	2
Texas	16	31	52	2/4[b]	150	150	100	2
Utah	15	29	52	4	75	75	100	2
Vermont	30	30	100	2	150	150	100	2
Virginia	0	40	0	4	0	100	0	2
Washington	25	49	51	4	98	98	100	2
West Virginia	17	34	50	4	100	100	100	2
Wisconsin	16	33	48	4	99	99	100	2
Wyoming	15	30	50	4	60	60	100	2
Total	1281	1972	65	N/A	4595	5411	85	N/A

Louis Jacobson of The Cook Political Report predicted that Republican-held chambers that could potentially flip to Democratic control included both chambers in Arizona, the Florida Senate, both chambers in Georgia, the Iowa House, the Michigan House, the Minnesota Senate, both chambers in North Carolina, both chambers in Pennsylvania, and the Texas House. He predicted that Republicans could potentially gain control of the Maine Senate, the Minnesota House, and both chambers in New Hampshire, all of which were controlled by the Democratic Party. Additionally, Jacobson predicted that Republicans could win control of the Alaska House, which was currently controlled by a coalition of Democrats and Republicans.^[9]

Writing for Sabato's Crystal Ball, Chaz Nuttycombe highlighted the Alaska House and the New Hampshire Senate as the top pick-up opportunities for Republicans, and lists the Arizona House, the Arizona Senate, the Iowa House, the Michigan House, the Minnesota Senate, the North Carolina House, the North Carolina Senate, the Pennsylvania House, and the Texas House as the top pick-up opportunities for Democrats.^[10]

Most election predictors use:

• "Tossup": No advantage
• "Tilt": Advantage that is not quite as strong as "lean"
• "Lean": Slight advantage
• "Likely": Significant, but surmountable, advantage
• "Safe" or "Solid": Near-certain chance of victory

State	PVI[11]	Chamber	Last election	Sabato May 7, 2020[10]	Cook Nov. 2, 2020[9]	Result
Alaska	R+9	Senate	R 13–7	Safe R	Lean R	R 13–7
		House of Representatives	Coal. 23–15–2	Tossup	Lean R (flip)	Coal. 21–17–2
Arizona	R+5	Senate	R 17–13	Tilt R	Tossup	R 16–14
		House of Representatives	R 31–29	Tilt R	Lean D (flip)	R 31–29
Arkansas	R+15	Senate	R 26–9	Safe R	Solid R	R 28–7
		House of Representatives	R 76–24	Safe R	Solid R	R 77–23
California	D+12	State Senate	D 29–11	Safe D	Solid D	D 31–9
		State Assembly	D 61–18–1	Safe D	Solid D	D 60–19–1
Colorado	D+1	Senate	D 19–16	Safe D	Likely D	D 20–15
		House of Representatives	D 41–24	Safe D	Solid D	D 41–24
Connecticut	D+6	State Senate	D 22–14	Likely D	Solid D	D 24–12
		House of Representatives	D 97–54	Safe D	Solid D	D 97–54
Delaware	D+6	Senate	D 12–9	Safe D	Likely D	D 14–7
		House of Representatives	D 26–15	Safe D	Solid D	D 26–15
Florida	R+2	Senate	R 23–17	Safe R	Lean R	R 24–16
		House of Representatives	R 73–47	Likely R	Likely R	R 78–42
Georgia	R+5	State Senate	R 35–21	Safe R	Lean R	R 34–22
		House of Representatives	R 105–75	Safe R	Lean R	R 103–77
Hawaii	D+18	Senate	D 24–1	Safe D	Solid D	D 24–1
		House of Representatives	D 46–5	Safe D	Solid D	D 47–4
Idaho	R+19	Senate	R 28–7	Safe R	Solid R	R 28–7
		House of Representatives	R 56–14	Safe R	Solid R	R 58–12
Illinois	D+7	Senate	D 40–19	Safe D	Solid D	D 41–18
		House of Representatives	D 74–44	Safe D	Solid D	D 73–45
Indiana	R+9	Senate	R 40–10	Safe R	Solid R	R 39–11
		House of Representatives	R 67–33	Safe R	Solid R	R 71–29
Iowa	R+3	Senate	R 32–18	Safe R	Likely R	R 32–18
		House of Representatives	R 53–47	Tossup	Tossup	R 59–41
Kansas	R+13	Senate	R 31–9	Safe R	Likely R	R 29–11
		House of Representatives	R 84–41	Safe R	Likely R	R 86–39
Kentucky	R+15	Senate	R 28–10	Safe R	Solid R	R 30–8
		House of Representatives	R 61–39	Safe R	Solid R	R 75–25
Maine	D+3	Senate	D 21–14	Likely D	Lean D	D 22–13
		House of Representatives	D 89–56–6	Likely D	Likely D	D 80–67–4
Massachusetts	D+12	Senate	D 34–6	Safe D	Solid D	D 37–3
		House of Representatives	D 127–32–1	Safe D	Solid D	D 129–30–1
Michigan	D+1	House of Representatives	R 58–52	Lean R	Tossup	R 58–52
Minnesota	D+1	Senate	R 35–32	Tossup	Tossup	R 34–33
		House of Representatives	D 75–59	Likely D	Lean D	D 70–64
Missouri	R+9	Senate	R 23–10	Safe R	Likely R	R 23–10
		House of Representatives	R 116–47	Safe R	Likely R	R 114–49
Montana	R+11	Senate	R 30–20	Safe R	Solid R	R 31–19
		House of Representatives	R 58–42	Safe R	Solid R	R 67–33
Nevada	D+1	Senate	D 13–8	Safe D	Likely D	D 12–9
		Assembly	D 29–13	Safe D	Likely D	D 26–16
New Hampshire	D+1	Senate	D 14–10	Lean D	Lean D	R 14–10
		House of Representatives	D 234–166	Likely D	Lean D	R 213–187
New Mexico	D+3	Senate	D 26–16	Likely D	Solid D	D 27–15
		House of Representatives	D 46–24	Likely D	Solid D	D 44–25–1
New York	D+11	State Senate	D 40–23	Likely D	Solid D	D 43–20
		State Assembly	D 105–44–1	Safe D	Solid D	D 105–43–1–1
North Carolina	R+3	Senate	R 29–21	Likely R	Tossup	R 28–22
		House of Representatives	R 65–55	Likely R	Lean R	R 69–51
North Dakota	R+16	Senate	R 37–10	Safe R	Solid R	R 40–7
		House of Representatives	R 79–15	Safe R	Solid R	R 80–14
Ohio	R+3	Senate	R 24–9	Safe R	Likely R	R 25–8
		House of Representatives	R 61–38	Safe R	Likely R	R 64–35
Oklahoma	R+20	Senate	R 38–9	Safe R	Solid R	R 38–9
		House of Representatives	R 77–23	Safe R	Solid R	R 82–19
Oregon	D+5	State Senate	D 18–12	Safe D	Likely D	D 18–12
		House of Representatives	D 38–22	Safe D	Likely D	D 37–23
Pennsylvania	EVEN	State Senate	R 28–21–1	Safe R	Lean R	R 28–21–1
		House of Representatives	R 110–93	Lean R	Tossup	R 113–90
Rhode Island	D+10	Senate	D 33–5	Safe D	Solid D	D 33–5
		House of Representatives	D 66–9	Safe D	Solid D	D 65–10
South Carolina	R+8	Senate	R 27–19	Safe R	Solid R	R 30–16
		House of Representatives	R 80–44	Safe R	Solid R	R 81–43
South Dakota	R+14	Senate	R 30–5	Safe R	Solid R	R 32–3
		House of Representatives	R 59–11	Safe R	Solid R	R 62–8
Tennessee	R+14	Senate	R 27–5	Safe R	Solid R	R 26–6
		House of Representatives	R 73–26	Safe R	Solid R	R 73–26
Texas	R+8	Senate	R 19–12	Safe R	Likely R	R 18–13
		House of Representatives	R 83–67	Lean R	Tossup	R 83–67
Utah	R+20	State Senate	R 23–6	Safe R	Solid R	R 23–6
		House of Representatives	R 59–16	Safe R	Solid R	R 58–17
Vermont	D+15	Senate	D 22–6–2	Safe D	Solid D	D 21–7–2
		House of Representatives	D 95–43–7–5	Safe D	Solid D	D 93–45–7–5
Washington	D+7	State Senate	D 28–21	Safe D	Likely D	D 28–21
		House of Representatives	D 57–41	Safe D	Solid D	D 57–41
West Virginia	R+19	Senate	R 20–14	Safe R	Likely R	R 23–11
		House of Delegates	R 59–41	Safe R	Solid R	R 76–24
Wisconsin	EVEN	Senate	R 19–14	Safe R	Likely R	R 21–12
		State Assembly	R 63–34	Safe R	Likely R	R 61–38
Wyoming	R+25	Senate	R 27–3	Safe R	Solid R	R 28–2
		House of Representatives	R 50–9–1	Safe R	Solid R	R 51–7–1–1

• 
  States holding regularly-scheduled legislative and gubernatorial elections in 2020:
  

    Governor and all legislative chambers

    All legislative chambers

    A portion of legislative chambers

    None
• 
  Partisan control of state and territorial governments following the 2020 elections:
  

    Democratic trifecta maintained

    Republican trifecta maintained

    Republican trifecta established

    Divided government established

    Divided government maintained

    Officially non-partisan legislature
• 
  Upper house seats by party holding majority in each state
  

  Republican   50–60%   60–70%   70–80%   80–90%   90–100%

  Democratic   50–60%   60–70%   70–80%   80–90%   90–100%

• 
  Lower house seats by party holding majority in each state
  

  Republican   50–60%   60–70%   70–80%   80–90%

  Democratic   50–60%   60–70%   70–80%   80–90%   90–100%

• 
  Net changes to upper house seats after the 2020 elections
       +1 Rep seat      +2 Rep seats      +3–4 Rep seats
       +1 Dem seat      +2 Dem seats      +4 Dem seats
• 
  Net changes to lower house seats after the 2020 elections
       +1 Rep seat      +2 Rep seats      +3–5 Rep seats      +6–47 Rep seats
       +1 Dem seat      +2 Dem seats
       +1 Lib seat      +2 Ind seats

Half of the seats of the Alaska Senate and all of the seats of the Alaska House of Representatives were up for election in 2020. The Alaska Senate is controlled by Republicans, while the Alaska House of Representatives is controlled by a coalition of Democrats, Republicans, and independents.^[12] The Alaska House of Representatives is currently the only state legislative chamber controlled by a cross-partisan coalition.

Alaska Senate

Party		Leader	Before	After	Change
	Republican	Lyman Hoffman	13	13
	Democratic	Tom Begich	7	7
Total			20	20

Alaska House of Representatives

Party		Leader	Before	After	Change
	Democratic	Bryce Edgmon	15[d]	15[e]
	Independent		2	4	2
	Republican	Lance Pruitt	6	2	3
			16	17
	Independent Republican		1	2	1
Total			40	40

All of the seats of the Arizona Senate and the Arizona House of Representatives were up for election in 2020. Republicans have a government trifecta with control of the governorship and both state legislative chambers.

Arizona Senate

Party		Leader	Before	After	Change
	Republican	Rick Gray	17	16	1
	Democratic	David Bradley	13	14	1
Total			30	30

Arizona House of Representatives

Party		Leader	Before	After	Change
	Republican	Russell Bowers	31	31
	Democratic	Charlene Fernandez	29	29
Total			60	60

Half of the seats of the Arkansas Senate and all of the seats of the Arkansas House of Representatives were up for election in 2020. Republicans held control of both chambers, maintaining a government trifecta.

Arkansas Senate

Party		Leader	Before	After	Change
	Republican	Bart Hester	26	28	2
	Democratic	Keith Ingram	9	7	2
Total			35	35

Arkansas House of Representatives

Party		Leader	Before	After	Change
	Republican	Matthew Shepherd	76	77	1
	Democratic	Fredrick Love	24	23	1
Total			100	100

Half of the seats of the California State Senate and all of the seats of the California State Assembly were up for election in 2020. Democrats held control of both chambers, maintaining a government trifecta.

California State Senate

Party		Leader	Before	After	Change
	Democratic	Toni Atkins	29	31	2
	Republican	Shannon Grove	11	9	2
Total			40	40

California State Assembly

Party		Leader	Before	After	Change
	Democratic	Anthony Rendon	61	60	1
	Republican	Marie Waldron	18	19	1
	Independent		1	1
Total			80	80

Half of the seats of the Colorado Senate and all of the seats of the Colorado House of Representatives were up for election in 2020. Democrats held control of both chambers, maintaining a government trifecta.

Colorado Senate

Party		Leader	Before	After	Change
	Democratic	Leroy Garcia	19	20	1
	Republican	Chris Holbert	16	15	1
Total			35	35

Colorado House of Representatives

Party		Leader	Before	After	Change
	Democratic	KC Becker	41	41
	Republican	Patrick Neville	24	24
Total			65	65

All of the seats of the Connecticut State Senate and the Connecticut House of Representatives were up for election in 2020. Democrats held control of both chambers, maintaining a government trifecta.

Connecticut State Senate

Party		Leader	Before	After	Change
	Democratic	Martin Looney	22	24	2
	Republican	Len Fasano	14	12	2
Total			36	36

Connecticut House of Representatives

Party		Leader	Before	After	Change
	Democratic	Matthew Ritter	97	97
	Republican	Themis Klarides	54	54
Total		151	151

Half of the seats of the Delaware Senate and all of the seats of the Delaware House of Representatives were up for election in 2020. Democrats held control of both chambers, maintaining a government trifecta.

Delaware Senate

Party		Leader	Before	After	Change
	Democratic	David McBride	12	14	2
	Republican	Gerald Hocker	9	7	2
Total			21	21

Delaware House of Representatives

Party		Leader	Before	After	Change
	Democratic	Peter Schwartzkopf	26	26
	Republican	Daniel Short	15	15
Total			41	41

Half of the seats of the Florida Senate and all of the seats of the Florida House of Representatives were up for election in 2020. Republicans held control of both chambers, maintaining a government trifecta.

Florida Senate

Party		Leader	Before	After	Change
	Republican	Kathleen Passidomo	23	24	1
	Democratic	Audrey Gibson	17	16	1
Total			40	40

Florida House of Representatives

Party		Leader	Before	After	Change
	Republican	José R. Oliva	71	78	7
	Democratic	Kionne McGhee	46	42	4
Total			120	120

All of the seats of the Georgia State Senate and the Georgia House of Representatives were up for election in 2020. Republicans held control of both chambers, maintaining a government trifecta.

Georgia State Senate

Party		Leader	Before	After	Change
	Republican	Butch Miller	35	34	1
	Democratic	Steve Henson	21	22	1
Total			56	56

Georgia House of Representatives

Party		Leader	Before	After	Change
	Republican	David Ralston	105	103	2
	Democratic	Bob Trammell	75	77	2
Total			180	180

Half of the seats of the Hawaii Senate and all of the seats of the Hawaii House of Representatives were up for election in 2020. Democrats held control of both chambers, maintaining a government trifecta.

Hawaii Senate

Party		Leader	Before	After	Change
	Democratic	Ron Kouchi	24	24
	Republican	Kurt Fevella	1	1
Total			25	25

Hawaii House of Representatives

Party		Leader	Before	After	Change
	Democratic	Scott Saiki	46	47	1
	Republican	Gene Ward	5	4	1
Total			51	51

All of the seats of the Idaho Senate and the Idaho House of Representatives were up for election in 2020. Republicans held control of both chambers, maintaining a government trifecta.

Idaho Senate

Party		Leader	Before	After	Change
	Republican	Chuck Winder	28	28
	Democratic	Michelle Stennett	7	7
Total			35	35

Idaho House of Representatives

Party		Leader	Before	After	Change
	Republican	Scott Bedke	56	58	2
	Democratic	Ilana Rubel	14	12	2
Total			70	70

One third of the seats of the Illinois Senate and all of the seats of the Illinois House of Representatives were up for election in 2020. Democrats held control of both chambers, maintaining a government trifecta.

Illinois Senate

Party		Leader	Before	After	Change
	Democratic	Don Harmon	40	41	1
	Republican	Bill Brady	19	18	1
Total			59	59

Illinois House of Representatives

Party		Leader	Before	After	Change
	Democratic	Mike Madigan	74	73	1
	Republican	Jim Durkin	44	45	1
Total			118	118

Half of the seats of the Indiana Senate and all of the seats of the Indiana House of Representatives were up for election in 2020. Republicans held control of both chambers, maintaining a government trifecta.

Indiana Senate

Party		Leader	Before	After	Change
	Republican	Rodric Bray	40	39	1
	Democratic	Greg Taylor	10	11	1
Total			50	50

Indiana House of Representatives

Party		Leader	Before	After	Change
	Republican	Todd Huston	67	71	4
	Democratic	Phil GiaQuinta	33	29	4
Total			100	100

Half of the seats of the Iowa Senate and all of the seats of the Iowa House of Representatives were up for election in 2020. Republicans held control of both chambers, maintaining a government trifecta.

Iowa Senate

Party		Leader	Before	After	Change
	Republican	Charles Schneider	32	32
	Democratic	Janet Petersen	18	18
Total			50	50

Iowa House of Representatives

Party		Leader	Before	After	Change
	Republican	Pat Grassley	53	59	6
	Democratic	Todd Prichard	47	41	6
Total			100	100

All of the seats of the Kansas Senate and the Kansas House of Representatives were up for election in 2020. Republicans held control of both chambers.

Kansas Senate

Party		Leader	Before	After	Change
	Republican	Susan Wagle	29	29
	Democratic	Anthony Hensley	11	11
Total			40	40

Kansas House of Representatives

Party		Leader	Before	After	Change
	Republican	Ron Ryckman Jr.	84	86	2
	Democratic	Tom Sawyer	41	39	2
Total			125	125

Half of the seats of the Kentucky Senate and all of the seats of the Kentucky House of Representatives were up for election in 2020. Republicans held control of both chambers. Because the Kentucky legislature can override gubernatorial vetoes with a simple majority vote, Republicans have a veto-proof majority in the state legislature.^[13]

Kentucky Senate

Party		Leader	Before	After	Change
	Republican	Robert Stivers	28	30	2
	Democratic	Morgan McGarvey	10	8	2
Total			38	38

Kentucky House of Representatives

Party		Leader	Before	After	Change
	Republican	David Osborne	61	75	14
	Democratic	Joni Jenkins	39	25	14
Total			100	100

All of the seats of the Maine Senate and the Maine House of Representatives were up for election in 2020. Democrats held control of both chambers, maintaining a government trifecta.

Maine Senate

Party		Leader	Before	After	Change
	Democratic	Troy Jackson	21	22	1
	Republican	Dana Dow	14	13	1
Total			35	35

Maine House of Representatives

Party		Leader	Before	After	Change
	Democratic	Sara Gideon	89	80	9
	Republican	Kathleen Dillingham	57	67	10
	Independent		5	4	1
Total			151	151

All of the seats of the Massachusetts Senate and the Massachusetts House of Representatives were up for election in 2020. Democrats retained control of both chambers.

Massachusetts Senate

Party		Leader	Before	After	Change
	Democratic	Karen Spilka	34	37	3
	Republican	Bruce Tarr	6	3	3
Total			40	40

Massachusetts House of Representatives

Party		Leader	Before	After	Change
	Democratic	Robert DeLeo	127	129	2
	Republican	Bradley Jones Jr.	32	30	2
	Independent		1	1
Total			160	160

All of the seats of the Michigan House of Representatives were up for election in 2020. The Michigan Senate did not hold regularly scheduled elections in 2020. Republicans maintained control of the chamber.

Michigan House of Representatives

Party		Leader	Before	After	Change
	Republican	Lee Chatfield	58	58
	Democratic	Christine Greig	52	52
Total			110	110

All of the seats of the Minnesota Senate and the Minnesota House of Representatives were up for election in 2020. Republicans maintained control of the senate, while Democrats maintained control of the house of representatives.

Minnesota Senate

Party		Leader	Before	After	Change
	Republican	Paul Gazelka	35	34	1
	Democratic (DFL)	Susan Kent	32	33	1
Total			67	67

Minnesota House of Representatives

Party		Leader	Before	After	Change
	Democratic (DFL)	Melissa Hortman	75	70	5
	Republican	Kurt Daudt	59	64	5
Total			134	134

Half of the seats of the Missouri Senate and all of the seats of the Missouri House of Representatives were up for election in 2020. Republicans held control of both chambers, maintaining a government trifecta.

Missouri Senate

Party		Leader	Before	After	Change
	Republican	Caleb Rowden	24	24
	Democratic	John Rizzo	10	10
Total			34	34

Missouri House of Representatives

Party		Leader	Before	After	Change
	Republican	Elijah Haahr	116	114	2
	Democratic	Crystal Quade	47	49	2
Total			163	163

Half of the seats of the Montana Senate and all of the seats of the Montana House of Representatives were up for election in 2020. Republicans held control of both chambers, and also gained a government trifecta by winning the gubernatorial election.

Montana Senate

Party		Leader	Before	After	Change
	Republican	Fred Thomas	30	31	1
	Democratic	Jon Sesso	20	19	1
Total			50	50

Montana House of Representatives

Party		Leader	Before	After	Change
	Republican	Greg Hertz	58	67	9
	Democratic	Casey Schreiner	42	33	9
Total			100	100

Nebraska is the only U.S. state with a unicameral legislature; half of the seats of the Nebraska Legislature were up for election in 2020. Nebraska is also unique in that its legislature is officially non-partisan and holds non-partisan elections, although the Democratic and Republican parties each endorse legislative candidates.

Nebraska Legislature

Party		Before	After	Change
	Republican	30	32	2
	Democratic	18	17	1
	Independent	1	0	1
Total		49	49

Half of the seats of the Nevada Senate and all of the seats of the Nevada Assembly were up for election in 2020. Democrats held control of both chambers, maintaining a government trifecta.

Nevada Senate

Party		Leader	Before	After	Change
	Democratic	Nicole Cannizzaro	13	12	1
	Republican	James Settelmeyer	8	9	1
Total			21	21

Nevada Assembly

Party		Leader	Before	After	Change
	Democratic	Jason Frierson	29	26	3
	Republican	Robin L. Titus	13	16	3
Total			42	42

All of the seats of the New Hampshire Senate and the New Hampshire House of Representatives were up for election in 2020. Republicans gained control of both chambers, establishing a government trifecta.

New Hampshire Senate

Party		Leader	Before	After	Change
	Republican	Chuck Morse	10	14	4
	Democratic	Donna Soucy	14	10	4
Total			24	24

New Hampshire House of Representatives

Party		Leader	Before	After	Change
	Republican	Dick Hinch	166	213	47
	Democratic	Steve Shurtleff	234	187	47
Total			400	400

All of the seats of the New Mexico Senate and the New Mexico House of Representatives were up for election in 2020. Democrats held control of both chambers, maintaining a government trifecta.

New Mexico Senate

Party		Leader	Before	After	Change
	Democratic	Peter Wirth	26	27	1
	Republican	Stuart Ingle	16	15	1
Total			42	42

New Mexico House of Representatives

Party		Leader	Before	After	Change
	Democratic	Brian Egolf	46	44	2
	Republican	James G. Townsend	24	25	1
	Independent		0	1	1
Total			70	70

All of the seats of the New York State Senate and the New York State Assembly were up for election in 2020. Democrats held control of both chambers, maintaining a government trifecta.

New York State Senate

Party		Leader	Before	After	Change
	Democratic	Andrea Stewart-Cousins	39	43	4
	Republican	Rob Ortt	24	20	4
Total			63	63

New York State Assembly

Party		Leader	Before	After	Change
	Democratic	Carl Heastie	105	105
	Republican	William Barclay	44	43	1
	Independence	Fred Thiele	1	1
	Independent		0	1	1
Total			150	150

All of the seats of the North Carolina Senate and the North Carolina House of Representatives were up for election in 2020. Republicans retained control of both chambers.

North Carolina Senate

Party		Leader	Before	After	Change
	Republican	Phil Berger	29	28	1
	Democratic	Dan Blue	21	22	1
Total			50	50

North Carolina House of Representatives

Party		Leader	Before	After	Change
	Republican	Tim Moore	65	69	4
	Democratic	Darren Jackson	55	51	4
Total			120	120

Half of the seats of the North Dakota Senate and the North Dakota House of Representatives were up for election in 2020. Republicans retained control of both chambers, maintaining a government trifecta.

North Dakota Senate

Party		Leader	Before	After	Change
	Republican	Rich Wardner	37	40	3
	Democratic-NPL	Joan Heckaman	10	7	3
Total			47	47

North Dakota House of Representatives

Party		Leader	Before	After	Change
	Republican	Lawrence Klemin	79	80	1
	Democratic-NPL	Joshua Boschee	15	14	1
Total			94	94

Half of the seats of the Ohio Senate and all of the seats of the Ohio House of Representatives were up for election in 2020. Republicans retained control of both chambers, maintaining a government trifecta.

Ohio Senate

Party		Leader	Before	After	Change
	Republican	Larry Obhof	24	25	1
	Democratic	Kenny Yuko	9	8	1
Total			33	33

Ohio House of Representatives

Party		Leader	Before	After	Change
	Republican	Robert R. Cupp	61	64	3
	Democratic	Emilia Sykes	38	35	3
Total			99	99

Half of the seats of the Oklahoma Senate and all of the seats of the Oklahoma House of Representatives were up for election in 2020. Republicans retained control of both chambers, maintaining a government trifecta.

Oklahoma Senate

Party		Leader	Before	After	Change
	Republican	Greg Treat	39	39
	Democratic	Kay Floyd	9	9
Total			48	48

Oklahoma House of Representatives

Party		Leader	Before	After	Change
	Republican	Charles McCall	77	82	5
	Democratic	Emily Virgin	24	19	5
Total			101	101

Half of the seats of the Oregon State Senate and all of the seats of the Oregon House of Representatives were up for election in 2020. Democrats retained control of both chambers, maintaining a government trifecta.

Oregon State Senate

Party		Leader	Before	After	Change
	Democratic	Rob Wagner	18	18
	Republican	Herman Baertschiger Jr.	12	12
Total			30	30

Oregon House of Representatives

Party		Leader	Before	After	Change
	Democratic	Tina Kotek	38	37	1
	Republican	Christine Drazan	22	23	1
Total			50	50

Half of the seats of the Pennsylvania State Senate and all of the seats of the Pennsylvania House of Representatives were up for election in 2020. Republicans retained control of both chambers.

Pennsylvania State Senate

Party		Leader	Before	After	Change
	Republican	Joe Scarnati	28	28
	Democratic	Jay Costa	21	21
	Independent		1	1
Total			50	50

Pennsylvania House of Representatives

Party		Leader	Before	After	Change
	Republican	Bryan Cutler	110	113	3
	Democratic	Frank Dermody	93	90	3
Total			203	203

All of the seats of the Rhode Island Senate and the Rhode Island House of Representatives were up for election in 2020. Democrats retained control of both chambers, maintaining a government trifecta.

Rhode Island Senate

Party		Leader	Before	After	Change
	Democratic	Michael McCaffrey	33	33
	Republican	Dennis Algiere	5	5
Total			38	38

Rhode Island House of Representatives

Party		Leader	Before	After	Change
	Democratic	Nicholas Mattiello	66	65	1
	Republican	Blake Filippi	8	10	2
Total			75	75

All of the seats of the South Carolina Senate and the South Carolina House of Representatives were up for election in 2020. Republicans retained control of both chambers, maintaining a government trifecta.

South Carolina Senate

Party		Leader	Before	After	Change
	Republican	Harvey S. Peeler Jr.	27	30	3
	Democratic	Nikki G. Setzler	19	16	3
Total			46	46

South Carolina House of Representatives

Party		Leader	Before	After	Change
	Republican	Jay Lucas	80	81	1
	Democratic	J. Todd Rutherford	43	42	1
Total			124	124

All of the seats of the South Dakota Senate and the South Dakota House of Representatives were up for election in 2020. Republicans retained control of both chambers, maintaining a government trifecta.

South Dakota Senate

Party		Leader	Before	After	Change
	Republican	Kris Langer	30	32	2
	Democratic	Troy Heinert	5	3	2
Total			35	35

South Dakota House of Representatives

Party		Leader	Before	After	Change
	Republican	Steven Haugaard	59	62	3
	Democratic	Jamie Smith	11	8	3
Total			70	70

Half of the seats of the Tennessee Senate and all of the seats of the Tennessee House of Representatives were up for election in 2020. Republicans retained control of both chambers, maintaining a government trifecta.

Tennessee Senate

Party		Leader	Before	After	Change
	Republican	Randy McNally	27	26	1
	Democratic	Jeff Yarbro	5	6	1
Total			33	33

Tennessee House of Representatives

Party		Leader	Before	After	Change
	Republican	Cameron Sexton	73	73
	Democratic	Karen Camper	25	26	1
	Independent	John DeBerry	1	0
Total			99	99

Half of the seats of the Texas Senate and all of the seats of the Texas House of Representatives were up for election in 2020. Republicans retained control of both chambers, maintaining a government trifecta.

Texas Senate

Party		Leader	Before	After	Change
	Republican	Brian Birdwell	19	18	1
	Democratic	John Whitmire	12	13	1
Total			31	31

Texas House of Representatives

Party		Leader	Before	After	Change
	Republican	Dennis Bonnen	83	83
	Democratic	Chris Turner	67	67
Total			150	150

Half of the seats of the Utah State Senate and all of the seats of the Utah House of Representatives were up for election in 2020. Republicans retained control of both chambers, maintaining a government trifecta.

Utah State Senate

Party		Leader	Before	After	Change
	Republican	J. Stuart Adams	23	23
	Democratic	Karen Mayne	6	6
Total			29	29

Utah House of Representatives

Party		Leader	Before	After	Change
	Republican	Brad Wilson	59	58	1
	Democratic	Brian King	16	17	1
Total			75	75

All of the seats of the Vermont Senate and the Vermont House of Representatives were up for election in 2020. Democrats retained control of both chambers.

Vermont Senate

Party		Leader	Before	After	Change
	Democratic	Becca Balint	22	21	1
	Republican	Joe Benning	6	7	1
	Progressive	Anthony Pollina	2	2
Total			30	30

Vermont House of Representatives

Party		Leader	Before	After	Change
	Democratic	Mitzi Johnson	95	93	2
	Republican	Patricia McCoy	43	45	2
	Progressive	Robin Chesnut-Tangerman	7	7
	Independent		5	5
Total			150	150

Half of the seats of the Washington State Senate and all of the seats of the Washington House of Representatives were up for election in 2020. Democrats retained control of both chambers, maintaining a government trifecta.

Washington State Senate

Party		Leader	Before	After	Change
	Democratic	Karen Keiser	28	28
	Republican	John Braun	21	21
Total			49	49

Washington House of Representatives

Party		Leader	Before	After	Change
	Democratic	Laurie Jinkins	57	57
	Republican	J. T. Wilcox	41	41
Total			98	98

Half of the seats of the West Virginia Senate and all of the seats of the West Virginia House of Delegates were up for election in 2020. Republicans retained control of both chambers, maintaining a government trifecta.

West Virginia Senate

Party		Leader	Before	After	Change
	Republican	Mitch Carmichael	20	23	3
	Democratic	Roman Prezioso	14	11	3
Total			34	34

West Virginia House of Delegates

Party		Leader	Before	After	Change
	Republican	Roger Hanshaw	58	76	18
	Democratic	Tim Miley	41	24	17
	Independent		1	0	1
Total			100	100

Half of the seats of the Wisconsin Senate and all of the seats of the Wisconsin State Assembly were up for election in 2020. Republicans retained control of both chambers.

Wisconsin Senate

Party		Leader	Before	After	Change
	Republican	Roger Roth	19	21	2
	Democratic	Janet Bewley	14	12	2
Total			33	33

Wisconsin State Assembly

Party		Leader	Before	After	Change
	Republican	Robin Vos	63	61	2
	Democratic	Gordon Hintz	36	38	2
Total			99	99

Half of the seats of the Wyoming Senate and all of the seats of the Wyoming House of Representatives were up for election in 2020. Republicans retained control of both chambers, maintaining a government trifecta.

Wyoming Senate

Party		Leader	Before	After	Change
	Republican	Drew Perkins	27	28	1
	Democratic	Chris Rothfuss	3	2	1
Total			30	30

Wyoming House of Representatives

Party		Leader	Before	After	Change
	Republican	Steve Harshman	50	51	1
	Democratic	Cathy Connolly	9	7	2
	Libertarian	—	0	1	1
	Independent	—	1	1
Total			60	60

All of the seats of the American Samoa Senate and the American Samoa House of Representatives were up for election. Members of the senate serve four-year terms, while members of the house of representative serve two-year terms. Gubernatorial and legislative elections are conducted on a nonpartisan basis in American Samoa.

All of the seats of the unicameral Legislature of Guam were up for election. All members of the legislature serve a two-year term. Democrats retained control of the legislature.

Guam Legislature

Party		Leader	Before	After	Change
	Democratic	Tina Rose Muña Barnes	10	8	2
	Republican	Telo T. Taitague	5	7	2
Total			15	15

A portion of the seats of the Northern Mariana Islands Senate, and all of the seats of the Northern Mariana Islands House of Representatives, were up for election. Members of the senate serve either four-year terms, while members of the house serve two-year terms. Republicans maintained control of the upper house, but the House was evenly split with one independent caucusing with the nine Republicans and two independents caucusing with the eight Democrats. Control of the chamber was secured for the Democratic-led caucus when one Republican crossed party lines to elect Democrat-aligned Independent Edmund Villagomez as Speaker of the House.^[14]

Northern Mariana Islands Senate^[15]

Party		Leader	Before	After	Change
	Republican	Victor Hocog	6	5	1
	Independent	Paul Manglona	3	3
	Democratic	Edith Guerrero	0	1	1
Total			9	9

Northern Mariana Islands House of Representatives^[16]

Party		Leader	Before	After	Change
	Republican	Blas Jonathan T. Attao	13	9	4
	Democratic	Edmund Villagomez	3	8	5
	Independent		3	3
Total			20	20

All of the seats of the Senate of Puerto Rico and the House of Representatives of Puerto Rico are up for election in 2020. Members of the Senate and the House of Representatives both serve four-year terms. The New Progressive Party lost control of both chambers, although the Popular Democratic Party only managed to gain majority control in the House due to the number of third-party candidates elected.

Puerto Rico Senate

Party		Leader	Before	After	Change
	Popular Democratic	José Luis Dalmau	4	13	9
	New Progressive	Thomas Rivera Schatz	21	9	12
	Citizen's Victory Movement	Ana Irma Rivera Lassén	0	2	2
	Puerto Rican Independence	María de Lourdes Santiago	1	1
	Project Dignity	Joanne Rodríguez Veve	0	1	1
	Independent		1	1
Total			27	27

Puerto Rico House of Representatives

Party		Leader	Before	After	Change
	Popular Democratic	Tatito Hernández	16	26	10
	New Progressive	Carlos Johnny Méndez	34	21	13
	Citizen's Victory Movement	Mariana Nogales Molinelli	0	2	2
	Puerto Rican Independence	Denis Márquez Lebrón	1	1
	Project Dignity	Lisie Burgos Muñiz	0	1	1
Total			51	51

All of the seats of the unicameral Legislature of the Virgin Islands were up for election in 2020. All members of the legislature serve a two-year term. Democrats retained control of the legislature.

Virgin Islands Legislature

Party		Leader	Before	After	Change
	Democratic	Novelle Francis	13	10	3
	Independent		2	5	3
Total			15	15

The Council of the District of Columbia serves as the legislative branch of the federal district of Washington, D.C. Half of the council seats are up for election in 2020. Council members serve four-year terms. Democrats retained supermajority control of the council.

District of Columbia Council

Party		Leader	Before	After	Change
	Democratic	Phil Mendelson	11	11
	Independent		2	2
Total		13	13

Various states held special elections for legislative districts throughout the year.^[17] Overall, Democrats flipped a total of five seats in Massachusetts, New Hampshire, Oregon, and South Carolina.

District		Incumbent			This race
Chamber	No.	Representative	Party	First elected	Results	Candidates
House	49	April Weaver	Republican	2010	Incumbent resigned May 12, 2020, to become a regional director for the U.S. Department of Health and Human Services.[18] New member elected November 17, 2020. Republican hold.	▌Y Russell Bedsole (Republican) 63.2% ▌ Cheryl Patton (Democratic) 36.7% ▌ Write-in 0.1%[19]

District		Incumbent			This race
Chamber	No.	Representative	Party	First elected	Results	Candidates
Senate	M	Chris Birch	Republican	2018	Incumbent died August 7, 2019, of aortic dissection.[20] New member elected November 3, 2020. Republican hold.	▌Y Josh Revak (Republican) 57.6% ▌ Andy Hollerman (Independent) 42.1% ▌ Write-in 0.3%[21]

District		Incumbent			This race
Chamber	No.	Representative	Party	First elected	Results	Candidates
House	22	Mickey Gates	Republican	2014	Incumbent was removed from office October 11, 2019, after being charged with tax evasion.[22] New member elected March 3, 2020. Republican hold.	▌Y Richard McGrew (Republican) 68.3% ▌ Judy Bowers (Libertarian) 31.7%[23]
House	34	John Walker	Democratic	2010	Incumbent died October 28, 2019.[24] New member elected March 3, 2020. Democratic hold.	▌Y Joy Springer (Democratic) 77.9% ▌ Roderick Talley (Independent) 22.1%[25]
House	96	Grant Hodges	Republican	2014	Incumbent resigned July 10, 2020, to take a job with Northwest Arkansas Community College.[26] New member elected November 3, 2020. Republican hold.	▌Y Jill Bryant (Republican) 100.0%[27]

District		Incumbent			This race
Chamber	No.	Representative	Party	First elected	Results	Candidates
Senate	28	Jeff Stone	Republican	2014	Incumbent resigned November 1, 2019, after being appointed Western Regional Director of the U.S. Department of Labor.[28] New member elected November 3, 2020. Republican hold.	▌Y Melissa Melendez (Republican) 55.4% ▌ Elizabeth Romero (Democratic) 44.6%[29]

District		Incumbent			This race
Chamber	No.	Representative	Party	First elected	Results	Candidates
House	48	Linda Orange	Democratic	1996	Incumbent died November 20, 2019, of pancreatic cancer.[30] New member elected January 14, 2020. Democratic hold.	▌▌Y Brian Smith (Democratic) 52.3% ▌▌ Mark DeCaprio 47.7%[31]
House	132	Brenda Kupchick	Republican	2010	Incumbent resigned November 22, 2019, after being elected First Selectwoman of Fairfield.[32] New member elected January 14, 2020. Republican hold.	▌▌Y Brian Farnen (Republican) 50.8% ▌ Jennifer Leeper (Democratic) 49.2%[33]
House	151	Fred Camillo	Republican	2008	Incumbent resigned December 2, 2019, after being elected First Selectman of Greenwich.[34] New member elected January 21, 2020. Republican hold.	▌Y Harry Arora (Republican) 54.4% ▌ Cheryl Moss (Democratic) 45.6%[35]

District		Incumbent			This race
Chamber	No.	Representative	Party	First elected	Results	Candidates
Senate	20	Tom Lee	Republican	2012	Incumbent resigned November 3, 2020, to consider a run for Hillsborough County Clerk of Court.[36] New member elected November 3, 2020. Republican hold.	▌Y Danny Burgess (Republican) 54.8% ▌ Kathy Lewis (Democratic) 45.2%[37]

District		Incumbent			This race
Chamber	No.	Representative	Party	First elected	Results	Candidates
House	171	Jay Powell	Republican	2008	Incumbent died November 25, 2019.[38] New member elected January 28, 2020. Republican hold.	▌Y Joe Campbell (Republican) 58.2% ▌ Jewell Howard 33.4% (Democratic) ▌ Tommy Akridge 8.4% (Republican)[39]
Senate	13	Greg Kirk	Republican	2014	Incumbent died December 22, 2019, of bile duct cancer.[40] New member elected March 3, 2020, after no one received over 50% of the vote on February 4, 2020. Republican hold.	First round: ▌Y Carden Summers (Republican) 43.1% ▌Y Jim Quinn (Republican) 42.2% ▌ Mary Egler (Democratic) 14.7%[41] Runoff: ▌Y Carden Summers (Republican) 52.0% ▌ Jim Quinn (Republican) 48.0%[42]
Senate	4	Jack Hill	Republican	2008	Incumbent died April 6, 2020.[43] New member elected August 11, 2020 after no one received over 50% of the vote on June 9, 2020. Republican hold.	First round: ▌Y Billy Hickman (Republican) 33.5% ▌Y Scott Bohlke (Republican) 31.9% ▌ Stephen Sammons (Independent) 14.7% ▌ Kathy Palmer (Republican) 15.3% ▌ Neil Singleton (Republican) 3.0%[44] Runoff: ▌Y Billy Hickman (Republican) 56.3% ▌ Scott Bohlke (Republican) 43.7%[45]
Senate	39	Nikema Williams	Democratic	2017 (special)	Incumbent resigned January 3, 2021, to become a U.S. representative.[46] New member elected December 1, 2020 after no one received over 50% of the vote on November 3, 2020. Democratic hold.[f]	First round: ▌Y Sonya Halpern (Democratic) 45.2% ▌Y Linda Pritchett (Democratic) 25.4% ▌ JoAnna Potts (Democratic) 15.5% ▌ Zan Fort (Democratic) 13.9%[47] Runoff: ▌Y Sonya Halpern (Democratic) 80.8% ▌ Linda Pritchett (Democratic) 19.2%[48]

District		Incumbent			This race
Chamber	No.	Representative	Party	First elected	Results	Candidates
Senate	16	Breene Harimoto	Democratic	2014	Incumbent died June 18, 2020, of pancreatic cancer.[49] New member elected November 3, 2020. Democratic hold.	▌Y Bennette Misalucha (Democratic) 52.7% ▌ Kelly Puamailani Kitashima (Republican) 47.3%[50]

District		Incumbent			This race
Chamber	No.	Representative	Party	First elected	Results	Candidates
Senate	6	John Cullerton	Democratic	1990	Incumbent resigned January 20, 2020 for personal reasons.[51] New member elected November 3, 2020. Democratic hold.	▌Y Sara Feigenholtz (Democratic)[52]
Senate	11	Martin Sandoval	Democratic	2002	Incumbent resigned January 1, 2020 amid a corruption scandal.[53] New member elected November 3, 2020. Democratic hold.	▌Y Celina Villanueva (Democratic) 79.7% ▌ Mary Ellen Brown (Democracy in America) 20.3%[52]

District		Incumbent			This race
Chamber	No.	Representative	Party	First elected	Results	Candidates
Senate	171	Dan Seum	Republican	1994	Incumbent resigned November 16, 2019, for personal reasons.[54] New member elected January 14, 2020. Republican hold.	▌Y Mike Nemes (Republican) 63.6% ▌ Andrew Bailey (Democratic) 36.4%[55]
House	67	Dennis Keene	Democratic	2004	Incumbent resigned December 16, 2019, to become the Kentucky Commissioner of Local Government.[56] New member elected February 25, 2020. Democratic hold.	▌Y Rachel Roberts (Democratic) 64.2% ▌ Mary Jo Wedding (Republican) 35.8%[57]
House	99	Rocky Adkins	Democratic	1986	Incumbent resigned December 10, 2019, to become senior advisor to Governor Andy Beshear.[58] New member elected February 25, 2020. Republican gain.	▌Y Richard White (Republican) 56.0% ▌ Bill Redwine (Democratic) 44.0%[59]
Senate	26	Ernie Harris	Republican	1994	Incumbent resigned on April 15, 2020 for personal reasons.[60] New member elected December 1, 2020. Democratic gain.	▌Y Karen Berg (Democratic) 57.0% ▌ Bill Ferko (Republican) 43.0%[61]

District		Incumbent			This race
Chamber	No.	Representative	Party	First elected	Results	Candidates
House	54	Reggie Bagala	Republican	2019	Incumbent died April 9, 2020, of COVID-19.[62] New member elected July 11, 2020. Republican hold.	▌Y Joseph Orgeron (Republican) 54.6% ▌ James Cantrelle (Republican) 19.6% ▌ Donny Lerille (Republican) 10.9% ▌ Kevin Duet (Republican) 9.3% ▌ Phil Gilligan (Republican) 3.3% ▌ Dave Carskadon (Republican) 2.4%[63]

District		Incumbent			This race
Chamber	No.	Representative	Party	First elected	Results	Candidates
House	128	Arthur Verow	Democratic	2018	Incumbent died December 19, 2019, of a heart attack.[64] New member elected March 3, 2020. Democratic hold.	▌Y Kevin O'Connell (Democratic) 58.0% ▌ Garrel Craig (Republican) 42.0%[65]

District		Incumbent			This race
Chamber	No.	Representative	Party	First elected	Results	Candidates
House	Middlesex 32	Paul A. Brodeur	Democratic	2010	Incumbent resigned November 15, 2019, to become Mayor of Melrose.[66] New member elected March 3, 2020. Democratic hold.	▌Y Kate Lipper-Garabedian (Democratic) 81.2% ▌ Brandon Reid (Republican) 18.5% ▌ Write-in 0.4%[67]
Senate	Plymouth and Barnstable	Vinny deMacedo	Republican	2014	Incumbent resigned November 29, 2019, to take a job in higher education.[68] New member elected May 11, 2020. Democratic gain.	▌Y Susan Moran (Democratic) 56.2% ▌ James McMahon (Republican) 43.7% ▌ Write-in 0.2%[69]
Senate	Hampden and Hampshire 2	Donald Humason Jr.	Republican	2012	Incumbent resigned January 5, 2020, to become Mayor of Westfield.[70] New member elected May 11, 2020. Democratic gain.	▌Y John Velis (Democratic) 64.2% ▌ John Cain (Republican) 35.8% ▌ Write-in 0.1%[71]
House	Bristol 3	Shaunna O'Connell	Republican	2010	Incumbent resigned January 6, 2020, to become Mayor of Taunton.[72] New member elected June 2, 2020. Democratic gain.	▌