Londonderry was a parliamentary constituency in Northern Ireland represented in the House of Commons of the UK Parliament, as well as a constituency in elections to various regional bodies.
In 1951, it was one of the last four seats to be uncontested in a United Kingdom general election.
From its inception Londonderry had a unionist majority, though by the 1970s the nationalist vote was approaching 40% in some elections.
In 1974 the Ulster Unionist Party repudiated the Sunningdale Agreement and so did not reselect Robin Chichester-Clark, who had been a Minister in the government of Edward Heath.
For the history of the area post 1983, please see Foyle (UK Parliament constituency) and East Londonderry.