Mid Armagh was a constituency of the Parliament of Northern Ireland.

It was created 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.

The constituency 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] The seat was always won by Ulster Unionist Party candidates.

It was contested on four occasions, by members of the Ulster Liberal Party and People's Democracy and by two independent Unionist candidates, all of whom took less than 30% of the votes cast.