Antrim is a town and civil parish in County Antrim in the northeast of Northern Ireland, on the banks of the Six Mile Water, on the northeast shore of Lough Neagh. It had a population of 25,606 people in the 2021 Census. It is the county town of County Antrim and was the administrative centre of Antrim Borough Council until its 2015 merger with Newtownabbey Borough Council to form Antrim and Newtownabbey Borough Council. It is 22 miles (35 km) northwest of Belfast.

County Antrim is one of the six counties of Northern Ireland, located within the historic province of Ulster. Adjoined to the north-east shore of Lough Neagh, the county covers an area of 3,086 square kilometres (1,192 sq mi) and has a population of 651,321, as of the 2021 census. County Antrim has a population density of 211 people per square kilometre or 546 people per square mile. It is also one of the thirty-two traditional counties of Ireland.