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

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.

[1] In common with other seats in south Belfast, the constituency was strongly unionist.

It was consistently won by Ulster Unionist Party candidates, although independent Unionist and labour candidates also stood.