Limerick is a city in county Limerick, Ireland. It is located in the Mid-West Region and is also part of the province of Munster. Limerick City and County Council is the local authority for the city. The city lies on the River Shannon, with the historic core of the city located on King's Island, which is bounded by the Shannon and the Abbey River. Limerick is also located at the head of the Shannon Estuary where the river widens before it flows into the Atlantic Ocean. Limerick is the third most populous city in the state, and the fourth most populous city on the island of Ireland.