South Londonderry was a UK Parliament constituency in Ireland. It returned one Member of Parliament (MP) to the British House of Commons from 1885 until it was abolished in 1922.

Boundaries and boundary changes

This county constituency comprised the southern part of County Londonderry. Its official title was the South Derry division of county Londonderry. 1885–1922: The barony of Loughinsholin, and that part of the barony of Coleraine not contained within the Division of North Derry. Prior to the 1885 United Kingdom general election and after the dissolution of Parliament in 1922 the area was part of the Londonderry constituency.

Politics

The constituency was a majority unionist area. All three candidates in 1918 were Roman Catholics. Had the Sinn Féin candidate won, then instead of taking up the Westminster seat he would have participated in the revolutionary First Dáil.

Members of Parliament

Elections

The elections in this constituency took place using the first past the post electoral system.

Elections in the 1880s

Elections in the 1890s

Elections in the 1900s

Elections in the 1910s

Gordon is appointed a judge, prompting a by-election.

Elections in the 1920s

Henry is appointed Lord Chief Justice of Northern Ireland, prompting a by-election. Chichester dies, causing a by-election.