Leitrim was a parliamentary constituency represented in Dáil Éireann, the lower house of the Oireachtas (the Irish parliament) from 1937 to 1948.
The constituency elected 3 deputies (Teachtaí Dála, commonly known as TDs) to the Dáil, on the system of proportional representation by means of the single transferable vote (PR-STV).
[1] Under the Electoral (Amendment) Act 1947, the Leitrim constituency was abolished, and the Sligo–Leitrim constituency was created for the 1948 general election.
[2] Some Dáil constituencies cross county boundaries, in order to ensure a reasonably consistent ratio of electors to TDs.
The 1935 Act defines the boundaries of the Leitrim constituency as being: Note: The columns in this table are used only for presentational purposes, and no significance should be attached to the order of columns.