South Londonderry (UK Parliament constituency)

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.

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

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.