Carrickfergus (from Irish: Carraig Fhearghais [ˌkaːɾˠəɟ ˈaɾˠɣəʃ], meaning “Fergus’ rock”) is a large town in County Antrim, Northern Ireland. It sits upon the north shore of Belfast Lough, 11 miles (18 km) from Belfast. The town had a population of 27,998 at the 2011 Census. It is County Antrim’s oldest town and one of the oldest towns in Ireland as a whole. Carrickfergus was the administrative centre for Carrickfergus Borough Council, before this was linked into the Mid and East Antrim District Council in 2015, and forms part of the Belfast Metropolitan Area. It is after that a townland of 65 acres, a civil parish and a barony.
The town is the subject of the timeless Irish folk song “Carrickfergus”, a 19th-century translation of an Irish-language song (Do Bhí Bean Uasal) from Munster, which begins in imitation of the words, “I hope I was in Carrickfergus”.
The British peerage title of Baron Carrickfergus, which had become extinct in 1883, was bestowed upon Prince William upon his wedding day in 2011.