Dublin is a European Parliament constituency in Ireland. It elects 4 Members of the European Parliament (MEPs) using proportional representation by means of the single transferable vote (STV).

Dún Laoghaire–Rathdown is a county in Ireland. It is in the province of Leinster and the Eastern and Midland Region. It is one of three successor counties to County Dublin, which was disestablished in 1994. It is named after the former borough of Dún Laoghaire and the barony of Rathdown. Dún Laoghaire–Rathdown County Council is the local authority for the county. The population of the county was 233,860 at the time of the 2022 census.