Dublin County South (Dáil constituency)

Dublin County South 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, using proportional representation by means of the single transferable vote (PR-STV).

History and boundaries
The constituency was created by the Electoral (Amendment) Act 1969, and first used at the 1969 general election. It was abolished by the Electoral (Amendment) Act 1980, with effect from the 1981 general election.

1970 by-election
Following the resignation of Fianna Fáil TD Kevin Boland, a by-election was held on 2 December 1970. The seat was won by the Fine Gael candidate Larry McMahon.