| Londonderry City | |
| Type: | borough |
| Borough: | Londonderry |
| Region: | Ireland |
| County: | County Londonderry |
| Parliament: | uk |
| Year: | 1801 |
| Abolished: | 1922 |
| Seats: | 1 |
| Previous: | Londonderry City (IHC) |
| Next: | Londonderry |
Londonderry City was a parliamentary constituency in Ireland. It returned one Member of Parliament (MP) to the United Kingdom House of Commons, elected by the first past the post voting system.
This constituency was the parliamentary borough of Londonderry (or Derry) in County Londonderry.
It was an original constituency represented in the first UK Parliament when the Acts of Union 1800 took effect on 1 January 1801, inheriting the boundaries and franchise of the Londonderry City constituency of the abolished Irish House of Commons. In 1922 it was combined with North Londonderry and South Londonderry, to form the Londonderry county constituency.
After the extension of the franchise in 1885, the constituency was one of the most marginal seats in Ireland.
Sinn Féin won in 1918. The MP, Professor Eoin MacNeill, was also returned for National University of Ireland. As MacNeill did not take his seat in the United Kingdom House of Commons he could not choose which constituency he would represent and arrange a by-election in the other. He played an active role in the First Dáil and in the government it set up.
The elections in this constituency took place using the first past the post electoral system.
On petition, Ferguson's election was declared void, causing a by-election.
Ferguson's death caused a by-election.
Dowse was appointed Solicitor-General for Ireland, requiring a by-election.
Dowse resigned after being appointed Chief Baron of the Irish Exchequer, causing a by-election.
On petition, Lewis was unseated. McCarthy was named as MP on 25 October.
Knox resigns, triggering a by-election.
Hamilton is appointed Treasurer of the Household, prompting a by-election in which he stood unopposed.
Hamilton becomes Duke of Abercorn, prompting a by-election.
Hogg's death prompts another by-election.
Book: Parliamentary Election Results in Ireland, 1801–1922. Brian M.. Walker. Royal Irish Academy. 1978. Dublin. 0901714127. 227, 295–296, 361–362, 392.