Mayo (Dáil constituency)

Mayo is a parliamentary constituency represented in Dáil Éireann, the lower house of the Irish parliament or Oireachtas. The constituency elects 4 deputies (Teachtaí Dála, commonly known as TDs) on the system of proportional representation by means of the single transferable vote (PR-STV).

History
At the 2002 general election Fine Gael suffered its worst electoral performance ever, losing 23 seats nationally, a figure larger than expected and with its overall vote down 5%. Enda Kenny came close to losing his seat and even went so far as to prepare a concession speech. In the end he won the third seat in the five-seat constituency.

At the 2011 general election, this was the constituency of Fine Gael leader Enda Kenny, who would become Taoiseach after the election. Fine Gael won four out of five seats in Mayo at that election. This was the first time any party won four seats in any five-seat Dáíl constituency; the last time any party had won four seats in a Dáil constituency was in the era of six- and seven-seat constituencies.

Boundaries
The constituency includes Castlebar, Westport and Ballina. Mayo is the largest Dáil constituency in Ireland by area.

The Electoral (Amendment) (Dáil Constituencies) Act 2017 defines the current constituency as:

The constituency was used for the first time at the 1997 general election and replaced the former constituencies of Mayo East and Mayo West.

In the Constituency Review Report 2023, the Electoral Commission recommended that the electoral divisions of Mayo that were in the Galway West constituency should be transferred to the Mayo constituency, thereby making the constituency comprise the entire county of Mayo. It was also allocated an extra seat and become a five seat constituency.

For the next general election, the Electoral (Amendment) Act 2023 defines the constituency as: