Belfast Oldpark was a constituency of the Parliament of Northern Ireland.

Belfast Oldpark was a borough constituency comprising part of northern Belfast.

It was created in 1929 when the House of Commons (Method of Voting and Redistribution of Seats) Act (Northern Ireland) 1929 introduced first-past-the-post elections throughout Northern Ireland.

It survived unchanged, returning one member of Parliament, until the Parliament of Northern Ireland was temporarily suspended in 1972, and then formally abolished in 1973.

The seat alternated between Unionist and labour movement representatives, and was often closely contested.