These same constituencies also replaced those provided in the Redistribution of Seats (Ireland) Act 1918 for representation of Ireland in the House of Commons of the United Kingdom at Westminster. Sinn Féin used these constituencies to elect the Second Dáil (1921–22) and those constituencies in Southern Ireland were used to elect the Third Dáil (1922–23).
The same electoral districts established for representation of Ireland in the House of Commons at Westminster under the Redistribution of Seats (Ireland) Act 1918 were utilized by Sinn Féin to elect the Second and Third Dáils, with those constituencies in Southern Ireland being used for the latter.