Munster (Irish: an Mhumhain [ə ˈwuːnʲ] or Cúige Mumhan [ˌkuːɟə ˈmˠuːnˠ]) is one of the provinces of Ireland, in the south of Ireland. In early Ireland, the Kingdom of Munster was one of the kingdoms of Gaelic Ireland ruled by a "king of over-kings" (Irish: rí ruirech). Following the Norman invasion of Ireland, the ancient kingdoms were shired into counties for administrative and judicial purposes. In later centuries, local government legislation has seen further sub-division of the historic counties.
Munster has no official function for local government purposes. For the purposes of the ISO, the province is listed as one of the provincial sub-divisions of the State (ISO 3166-2:IE) and coded as "IE-M". Geographically, Munster covers a total area of 24,675 km2 (9,527 sq mi) and has a population of 1,280,020, with the most populated city being Cork. Other significant urban centres in the province include Limerick and Waterford.