Fermanagh and Tyrone was a county constituency of the Parliament of Northern Ireland from 1921 to 1929.

It returned eight MPs, using proportional representation by means of the single transferable vote.

[1] In May 1921, Dáil Éireann, the parliament of the self-declared Irish Republic run by Sinn Féin, passed a resolution declaring that elections to the House of Commons of Northern Ireland and the House of Commons of Southern Ireland would be used as the election for the Second Dáil.

[3] O'Mahony was the only Sinn Féin TD in the Second Dáil who represented only a constituency in Northern Ireland.

Fermanagh and Tyrone had a slight Nationalist majority, but this was fairly evenly balanced with a Unionist minority.