Donegal South-West was a parliamentary constituency represented in Dáil Éireann, the lower house of the Irish parliament or Oireachtas, from 1961 to 1969 and from 1981 to 2016. The constituency elected 3 deputies (Teachtaí Dála, commonly known as TDs). The method of election was proportional representation by means of the single transferable vote (PR-STV).
History and boundaries
The constituency was first created for the 1961 general election. At the 1969 general election it was abolished and largely succeeded by the Donegal–Leitrim constituency. It was recreated for the 1981 general election. It was located in the southern and western parts of County Donegal, it included the towns of Lifford, Donegal, Ballyshannon, Killybegs and Gweedore. It was abolished again at the 2016 general election, and was succeeded by the Donegal constituency.
The Electoral (Amendment) Act 2009 defined the constituency as: