Roussillon Regional County Municipality

Roussillon
Regional county municipality
Location in province of Quebec.
Coordinates: 45°22′N 73°34′W / 45.367°N 73.567°W / 45.367; -73.567[1]
Country	Canada
Province	Quebec
Region	Montérégie
Effective	January 1, 1982
Named for	Régiment Royal Roussillon[1]
County seat	Saint-Constant
Government [2]
• Type	Prefecture
• Prefect	Nathalie Simon
Area [2][3]
• Total	403.60 km2 (155.83 sq mi)
• Land	423.82 km2 (163.64 sq mi)
	There is an apparent contradiction between two authoritative sources
Population  (2016)[3]
• Total	171,443
• Density	404.5/km2 (1,048/sq mi)
• Change 2011–2016	5.7%
	Population excludes incompletely enumerated First Nations reserves
Time zone	UTC−5 (EST)
• Summer (DST)	UTC−4 (EDT)
Area code(s)	450 and 579
Website	www.mrcroussillon.qc.ca

Roussillon (French pronunciation: [ʁusijɔ̃]) is a regional county municipality in the Montérégie region of Quebec, Canada. The seat is in Saint-Constant, Quebec. The region's population was 171,443 as of the 2016 census.^[3]

There are 11 subdivisions and one native reserve within the RCM:^[2]

Canada Census Mother Tongue - Roussillon Regional County Municipality[9]
Census		Total		French				English				French & English				Other
Year		Responses		Count	Trend	Pop %		Count	Trend	Pop %		Count	Trend	Pop %		Count	Trend	Pop %
2021		184,130		131,390	0.13%	71.35%		20,740	8.5%	11.26%		3,985	67.78%	2.16%		24,535	50.10%	13.32%
2016		170,835		131,215	2.7%	76.8%		19,115	2.02%	11.12%		2375	16.14%	1.39%		16,345	38.28%	9.57%
2011		160,260		127,660	4.3%	79.66%		18,735	13.2%	11.69%		2,045	89.4%	1.28%		11,820	37.6%	7.37%
2006		148,560		122,345	7.4%	82.35%		16,545	1.1%	11.14%		1,080	8.5%	0.73%		8,590	48.2%	5.78%
2001		137,200		113,865	6.3%	82.99%		16,360	4.2%	11.93%		1,180	11.3%	0.86%		5,795	6.1%	4.22%
1996		130,975		107,105	n/a	81.78%		17,080	n/a	13.04%		1,330	n/a	1.01%		5,460	n/a	4.17%

Highways and numbered routes that run through the municipality, including external routes that start or finish at the county border:^[11]

• List of regional county municipalities and equivalent territories in Quebec