- Dublin (/ˈdʌblɪn/; Irish: Baile Átha Cliath, pronounced [ˈbˠalʲə aːhə ˈclʲiə] or [ˌbʲlʲaː ˈclʲiə]) is the capital and largest city of Ireland. On a bay at the mouth of the River Liffey, it is in the province of Leinster, bordered on the south by the Dublin Mountains, a part of the Wicklow Mountains range. At the 2022 census, the municipal area had a population of 592,713, while Dublin City and its suburbs had a population of 1,263,219, and County Dublin had a population of 1,458,154.