Roscommon–Leitrim was a parliamentary constituency represented in Dáil Éireann, the lower house of the Irish parliament or Oireachtas from 1969 to 1981.
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).
The constituency was created under the Electoral (Amendment) Act 1969, and first used for the 1969 general election.
Its boundaries were revised in 1977, but the number of seats remained unchanged.
The following areas in Galway North-East: The following areas in Clare–South Galway: The following parts of Leitrim in Sligo–Leitrim: Note: The columns in this table are used only for presentational purposes, and no significance should be attached to the order of columns.