Mid Londonderry was a county constituency comprising the central part of County Londonderry.

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.

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 constituency was primarily rural and included areas between Coleraine, Limavady, Derry and Magherafelt.

[2] The seat was held until 1969 by Nationalist Party candidates, and was rarely contested.