2019 Mayo County Council election

An election to all 30 seats on Mayo County Council election was held on 24 May 2019 as part of the 2019 Irish local elections. County Mayo was divided into 6 local electoral areas (LEAs) to elect councillors for a five-year term of office on the electoral system of proportional representation by means of the single transferable vote (PR-STV).

Boundary review
Following the recommendations of the 2018 LEA boundary review committee, there were significant alterations to the LEAs used at the 2014 Mayo County Council election. Its terms of reference set a maximum LEA size of 7 seats, breached by two of the 2014 LEAs. Other changes reflected population shifts revealed by the 2016 census.