Independence referendum

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An independence referendum is a type of referendum in which the residents of a territory decide whether the territory should become an independent sovereign state. An independence referendum that results in a vote for independence does not always ultimately result in independence.

An independence referendum typically arises first after political success for nationalists of a territory. This could come in the election of politicians or parties with separatist policies, or from pressure from nationalist organisations.

Negotiations for the terms of an independence referendum may take place between the nationalists and the government which exercises sovereignty over the territory. If terms can be agreed, then the independence referendum can be held with its result binding, and respected by the international community. Independence referendums can be held without the consent of a national or the federal governments, then the international community will rely on several other factors, e.g. were the local people oppressed by the central government or not, to decide if the result can be recognized or not.

Various issues can be discussed in negotiations, such as the date and timing of the poll, as well as voter eligibility. For these instances, common electoral practice is often widely used, although there can be deviations, as seen with the lowering of the voting age for the 2014 Scottish independence referendum.

Other issues to be negotiated include what question or questions should be on the ballot, and what the voting options could be. Independence referendums can offer options of greater autonomy as well as, or instead of, the status quo. They can also put forward other constitutional questions to ballot. The questions that referendums ask may be revised if parties involved in negotiations consider them to be too leading.

Negotiations notably need to address what would make a result binding. For some independence referendums, a simple majority is required for one option. In other cases, a quota can be used, where a certain percentage of the vote or the electorate needs to be in favour of an option for it to be binding.

Successful negotiations can be hard to achieve for nationalists, as governments can be reluctant to give up sovereignty. For example, nationalists planned to hold a referendum in Catalonia in 2014, but met opposition from the Spanish government. As a result, the referendum that went ahead was unofficial and non-binding.

In the event of a vote for independence, there may be negotiations on the terms of secession for the territory from the sovereign state. A declaration of independence for a new state is then made, and international recognition can follow, as well as membership of international organisations such as the United Nations. In cases involving non-binding referendums, this can lead to a unilateral declaration of independence, and therefore partially recognised or self-proclaimed states, like the Donbas status referendums.

In the event of a vote against independence, there may still be a strong nationalist movement and calls for there to be a rerun of the independence referendum. For example, after two referendums in Quebec, the Parti Québécois has continued to raise the prospect of holding another referendum,^[1] and the Scottish National Party has said that there should be a repeat of the 2014 referendum now that the United Kingdom has left the European Union.

Proposed state	Year	Proposed independence from	Majority for independence	Independence	Recognition of result	Notes
Chile	1817	Spain	Yes	Yes	No	Unilaterally declared independence.
Liberia	1846	American Colonization Society	Yes	Yes	Yes
Maryland in Liberia	1853	Maryland State Colonization Society	Yes	Yes	Yes
Norway	1905	Sweden–Norway	Yes	Yes	Yes
Iceland	1918	Denmark	Yes	Yes	Yes
Western Australia	1933	Australia	Yes	No	No
Cambodia	1945	France	Yes	Yes	Yes
Mongolia	1945	China	Yes	Yes	Yes	Initially recognized by the Republic of China, but recognition was abolished in 1953; recognized by the People's Republic of China.
Faroe Islands	1946	Denmark	Yes	No	No	Independence declaration annulled by Denmark.
Newfoundland	1948	United Kingdom	No	No	Yes	Integrated with Canada.
Nagaland	1951	India	Yes	No	No	Unrecognized by the government of India.[2]
Saar	1955	France	No	No	Yes	Integrated with West Germany.
Cameroon	1958		No	No	Yes	Referendum on a new French constitution. A no vote would have led to independence.
Central African Republic	1958		No	No	Yes
Chad	1958		No	No	Yes
Comoros	1958		No	No	Yes
Congo	1958		No	No	Yes
Dahomey	1958		No	No	Yes
Djibouti	1958		No	No	Yes
French Polynesia	1958		No	No	Yes
Gabon	1958		No	No	Yes
Guinea	1958		Yes	Yes	Yes
Ivory Coast	1958		No	No	Yes
Madagascar	1958		No	No	Yes
Mali	1958		No	No	Yes
Mauritania	1958		No	No	Yes
New Caledonia	1958		No	No	Yes
Niger	1958		No	No	Yes
Saint Pierre and Miquelon	1958		No	No	Yes
Senegal	1958		No	No	Yes
Upper Volta	1958		No	No	Yes
Western Samoa	1961	New Zealand	Yes	Yes	Yes
Algeria	1962	France	Yes	Yes	Yes
Malta	1964	United Kingdom	Yes	Yes	Yes
Rhodesia	1964		Yes	De facto	No	Unilaterally declared independence.
Djibouti	1967	France	No	No	Yes
Puerto Rico	1967	United States	No	No	Yes
West Papua	1969	Indonesia	No	No	Yes
Northern Mariana Islands	1969	United States	No	No	Yes
Bahrain	1970	United Kingdom	Yes	Yes	Yes
Niue	1974	New Zealand	Majority for associated status	Associated status achieved	Yes	Became an associated state of New Zealand.
Comoros	1974	France	Yes	Yes	Yes	Mayotte remained with France.
Trust Territory of the Pacific Islands	1975	United States	No	No	Yes
Guam	1976		No	No	Yes
Aruba	1977	Netherlands	Yes	No	Yes	Independence plans dropped in 1994.
Djibouti	1977	France	Yes	Yes	Yes
Nevis	1977	Saint Christopher-Nevis-Anguilla	Yes	No	No	Unofficial referendum to become independent from Saint Christopher-Nevis-Anguilla and attain Crown colony status within the British Empire. Unrecognized by the central government.
Quebec	1980	Canada	No	No	Yes
Ciskei	1980	South Africa	Yes	De facto	Partial	Recognized by South Africa; not by the international community.
Guam	1982	United States	No	No	Yes
Micronesia	1983		Yes	Yes	Yes	Became an associated state of the United States.
Marshall Islands	1983		No	No	Yes
Palau	1983		No	No	Yes	Became an associated state of the United States.
	1984		No	No	Yes
Cocos (Keeling) Islands	1984	Australia	No	No	Yes
Falkland Islands	1986	United Kingdom	No	No	Yes
New Caledonia	1987	France	No	No	Yes
Slovenia	1990	Yugoslavia	Yes	Yes	Yes	Unilaterally declared independence.
Armenia	1991	Soviet Union	Yes	Yes	Yes
Azerbaijan	1991		Yes	Yes	Yes
Croatia	1991	Yugoslavia	Yes	Yes	Yes	Unilaterally declared independence.
Estonia	1991	Soviet Union	Yes	Yes	Yes
Georgia	1991		Yes	Yes	Yes
Kosova	1991	Yugoslavia	Yes	No	No	Only recognized by Albania.
Latvia	1991	Soviet Union	Yes	Yes	Yes
Lithuania	1991		Yes	Yes	Yes
Macedonia	1991	Yugoslavia	Yes	Yes	Yes
Nagorno-Karabakh	1991	Soviet Union	Yes	De facto	No	Unilaterally declared independence.
Ukraine	1991		Yes	Yes	Yes
Transnistria	1991		Yes	De facto	No	Unilaterally declared independence.
Gagauz Republic	1991		Yes	De facto[3]	No	Unilaterally separated from Moldova; reintegrated into the country in 1995.
Turkmenistan	1991		Yes	Yes	Yes
Uzbekistan	1991		Yes	Yes	Yes
Bosnia and Herzegovina	1992	Yugoslavia	Yes	Yes	Yes	Unilaterally declared independence.
Montenegro	1992		No	No	Yes	Montenegro split from Serbia and Montenegro in 2006.
South Ossetia	1992	Georgia	Yes	De facto	No	Unilaterally declared independence.
Tatarstan	1992	Russia	Yes	Yes	No	Reintegrated with Russia in 1994.
Eritrea	1993	Ethiopia	Yes	Yes	Yes
United States Virgin Islands	1993	United States	No	No	Yes
Puerto Rico	1993		No	No	Yes
Curaçao	1993	Netherlands	No	No	Yes
Bonaire	1994		No	No	Yes
Sint Maarten	1994		No	No	Yes
Saba	1994		No	No	Yes
Sint Eustatius	1994		No	No	Yes
Bermuda	1995	United Kingdom	No	No	Yes
Quebec	1995	Canada	No	No	Yes
Seborga	1995[4]	Italy	Yes	No	No	Regarded as a micronation.
Anjouan	1997	Comoros	Yes	De facto	No	Reintegrated with the Comoros in 2001.
Nevis	1998	Saint Kitts and Nevis	Yes	No	Yes	2/3 majority was required for independence.
Puerto Rico	1998	United States	No	No	Yes
East Timor	1999	Indonesia	Yes	Yes	Yes
Sint Maarten	2000	Netherlands	No	No	Yes
Somaliland	2001	Somalia	Yes	De facto	No
Bonaire	2004	Netherlands	No	No	Yes
Saba	2004		No	No	Yes
Kurdistan	2005	Iraq	Yes	No	No
Curaçao	2005	Netherlands	No	No	Yes
Sint Eustatius	2005		No	No	Yes
Montenegro	2006	Serbia and Montenegro	Yes	Yes	Yes
South Ossetia	2006	Georgia	Yes	De facto	No
Transnistria	2006	Moldova	Yes	De facto	No
Tokelau	2006	New Zealand	Majority for associated status but Quorum not reached	Associated status not achieved	Yes	The referendum was on whether Tokelau should become an associated state of New Zealand. 2/3 majority was required.
	2007		Majority for associated status but Quorum not reached	Associated status not achieved	Yes
Tamil Eelam	2009–2010	Sri Lanka	Yes	No	No	Unofficial referendum. Unrecognized by the government of Sri Lanka.
South Sudan	2011	Sudan	Yes[5]	Yes	Yes
Puerto Rico	2012	United States	No	No	Yes
Donetsk	2014	Ukraine	Yes[6]	De facto[7]	No	Unilaterally declared independence.
Luhansk	2014		Yes[6]	De facto[7]	No	Unilaterally declared independence.
Veneto	2014	Italy	Yes	No	No	Unofficial referendum. Unrecognized by the government of Italy.
Scotland	2014	United Kingdom	No	No	Yes
Catalonia	2014	Spain	Yes	No	No
Sint Eustatius	2014	Kingdom of the Netherlands	No	No	Yes
South Brazil	2016	Brazil	Yes	No	No	Unofficial referendum. Unrecognized by the government of Brazil.
Puerto Rico	2017	United States	No	No	Yes
Kurdistan	2017	Iraq	Yes	No[8]	No	The referendum also took place in the disputed territories of Northern Iraq.
Catalonia	2017	Spain	Yes	No[9]	No	Unilaterally declared independence. Declaration annulled by the government of Spain.[10]
South Brazil	2017	Brazil	Yes	No	No	Unofficial referendum. Unrecognized by the government of Brazil.
New Caledonia	2018	France	No	No	Yes
Bougainville	2019	Papua New Guinea	Yes	Subject to negotiation[11]	Yes	Nonbinding vote.[12] Independence rests with Papua New Guinea's parliament.[13]
New Caledonia	2020	France	No	No[14]	Yes
	2021		No	No	Yes	Boycotted by pro-independence parties.[15]
Puerto Rico	2024	United States	No	No	Yes

• Harguindéguy, J.-B., Sánchez, E. S., & Sánchez, A. S. (2021). "Why do central states accept holding independence referendums? Analyzing the role of state peripheries." Electoral Studies.
• Juve J. Cortés Rivera (2020). "Creating new states: the strategic use of referendums in secession movements." Territory, Politics, Governance