This page lists Dáil constituencies that have been used for elections to Dáil Éireann from the 1918 election to the 2024 general election.
In the case of the First Dáil, the constituencies were created for the House of Commons of the United Kingdom; in the case of the Second Dáil, they were created for the Northern Ireland House of Commons and the House of Commons of Southern Ireland.
Although only Sinn Féin members took their seats as TDs in the revolutionary period of Dáil Éireann, MPs from other parties were invited; on this basis, all constituencies used in 1918 and 1921 are included in this list of Dáil constituencies.
From the Fourth Dáil on, they were adjusted by Irish legislation.
Alterations to constituencies take effect on the dissolution of the Dáil sitting when a revision is made; therefore, any by-elections take place according to the constituency boundaries in place at the previous election.