The list of by-elections in the United Kingdom is divided chronologically by parliament:

Parliament of the United Kingdom

List of United Kingdom by-elections (1801–1806) This is a list of parliamentary by-elections in the United Kingdom held between 1801 and 1806, with the names of the previous incumbent and the victor in the by-election. In the absence of a comprehensive and reliable source for party and factio ...

* List of United Kingdom by-elections (1806–1818) *

List of United Kingdom by-elections (1818–1832) This is a list of parliamentary by-elections in the United Kingdom held between 1818 and 1832, with the names of the previous incumbent and the victor in the by-election. In the absence of a comprehensive and reliable source, for party and fac ...

* List of United Kingdom by-elections (1832–1847) *

List of United Kingdom by-elections (1847–1857) This is a list of parliamentary by-elections in the United Kingdom held between 1847 and 1857, with the names of the previous incumbent and the victor in the by-election and their respective parties. Where seats changed political party at the ele ...

List of United Kingdom by-elections (1857–1868) This is a list of parliamentary by-elections in the United Kingdom held between 1857 and 1868, with the names of the previous incumbent and the victor in the by-election and their respective parties. Where seats changed political party at the el ...

* List of United Kingdom by-elections (1868–1885) *

List of United Kingdom by-elections (1885–1900) This is a list of parliamentary by-elections in the United Kingdom held between 1885 and 1900, with the names of the previous incumbent and the victor in the by-election and their respective parties. Where seats changed political party at the el ...

List of United Kingdom by-elections (1900–1918) This is a list of parliamentary by-elections in the United Kingdom held between 1900 and 1918, with the names of the incumbent and victor and their respective parties. Where seats changed political party at the election, the result is highlighte ...

List of United Kingdom by-elections (1918–1931) This is a list of parliamentary by-elections in the United Kingdom held between 1918 and 1931, with the names of the incumbent and victor and their respective parties. Where seats changed political party at the election, the result is highlighte ...

List of United Kingdom by-elections (1931–1950) This is a list of parliamentary by-elections in the United Kingdom held between 1931 and 1950, with the names of the incumbent and victor and their respective parties. Where seats changed political party at the election, the result is highlighted ...

List of United Kingdom by-elections (1950–1979) This is a list of parliamentary by-elections in the United Kingdom, with the names of the incumbent and victor and their respective parties. Where seats changed political party at the election, the result is highlighted: red for a Labour gain, ...

List of United Kingdom by-elections (1979–2010) There were 130 parliamentary by-elections in the United Kingdom between the 1979 and 2010 general elections. In the list below, the names of the incumbent and victor and their respective parties are given. Where seats changed political party at ...

List of United Kingdom by-elections (2010–present) This is a list of parliamentary by-elections in the United Kingdom since 2010, with the names of the incumbent and victor and their respective parties. Where seats changed political party at the election, the result is highlighted: blue for a Co ...

By-elections to the House of Lords Following the enactment of the House of Lords Act 1999, the number of hereditary peers entitled to sit in the House of Lords was reduced to ninety-two. Ninety of the first ninety-two were elected by all the hereditary peers before the passing of t ...

(hereditary peers)

Parliament of Great Britain

* List of Great Britain by-elections (1707–1715) *

List of Great Britain by-elections (1715–1734) This is a list of parliamentary by-elections in Great Britain held between 1715 and 1734, with the names of the previous incumbent and the victor in the by-election. In the absence of a comprehensive and reliable source, for party and factional ...

List of Great Britain by-elections (1734–1754) This is a list of parliamentary by-elections in Great Britain held between 1734 and 1754, with the names of the previous incumbent and the victor in the by-election. In the absence of a comprehensive and reliable source, for party and factional ...

* List of Great Britain by-elections (1754–1774) *

List of Great Britain by-elections (1774–1790) This is a list of parliamentary by-elections in Great Britain held between 1774 and 1790, with the names of the previous incumbent and the victor in the by-election. In the absence of a comprehensive and reliable source, for party and factional ...

List of Great Britain by-elections (1790–1800) This is a list of parliamentary by-elections in Great Britain held between 1790 and 1800, with the names of the previous incumbent and the victor in the by-election. In the absence of a comprehensive and reliable source, for party and factional ...

Parliament of England

List of English by-elections (1689–1700) This is a list of parliamentary by-election A by-election, also known as a special election in the United States and the Philippines, a bye-election in Ireland, a bypoll in India, or a Zimni election (Urdu: ضمنی انتخاب, supplementary e ...

List of English by-elections (1701–1707) This is a list of parliamentary by-election A by-election, also known as a special election in the United States and the Philippines, a bye-election in Ireland, a bypoll in India, or a Zimni election (Urdu: ضمنی انتخاب, supplementary e ...

Other parliaments

List of by-elections to the Scottish Parliament The Scottish Parliament is the devolved legislature of Scotland. It was founded in 1999. The 129 members of the Scottish Parliament (MSPs) are elected using the additional member system. 73 MSPs are elected through the first-past-the-post syste ...

List of by-elections to the National Assembly for Wales This is a list of by-elections to the Senedd (Welsh Parliament; ; formerly known as the National Assembly for Wales). :''Where seats changed political party at the by-election, the result is highlighted.'' ''*Peter Law left the Labour Party and s ...

List of European Parliament by-elections in the United Kingdom By-elections to the European Parliament in the United Kingdom were held during the period when the United Kingdom used single-member, first-past-the-post constituencies to elect Members of the European Parliament from 1979 to 1999: they were requi ...

List of Northern Ireland Parliament by-elections This is a list of by-elections to the Northern Ireland House of Commons, from its creation in 1921 until its abolition in 1972. References Biographies of Members of the Northern Ireland House of Commons {{DEFAULTSORT:Northern Ireland Parl ...

(1921–1972) *''Northern Ireland Assembly vacancies are filled by co-option''

Local government

Local government by-election results are generally given on the page for the last election in that area, see :Council elections in the United Kingdom

Parliament of the United Kingdom

Parliament of Great Britain

Parliament of England

Other parliaments

Local government

See also