The 1921 Irish elections comprised separate elections in the six counties of Northern Ireland and the twenty-six counties of Southern Ireland. In Irish republican theory, this was a single election to fill the 180 seats (52 from Northern Ireland and 128 from Southern Ireland) in the Second Dáil. In practice, only the Sinn Féin MPs took their seats as TDs in Dublin. This Dáil first assembled on 16 August 1921, and last met (at least in the view of the subsequent Irish Free State) on 8 June 1922.