The Community Assembly of County Antrim is located in Antrim, named from the irish word Aontroim, meaning 'lone ridge '. It 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, County Antrim is also one of the thirty-two traditional counties of Ireland.

The Glens of Antrim offer isolated rugged landscapes with the famous Giant's Causeway providing a unique landscape which is recognised as a World Heritage Site, Bushmills produces whiskey, and Portrush is a popular seaside resort and nightlife area. The majority of Belfast, the capital city of Northern Ireland, is located in County Antrim, with the remainder being in County Down.

The antiquities of the county consist of cairns, mounts or forts, remains of ecclesiastical and military structures, and round towers. There are three round towers: one at Antrim, one at Armoy and one on Ram's Island in Lough Neagh. There are some remains of the ecclesiastic establishments at Bonamargy, and the castle at Carrickfergus, dates from the Norman invasion of Ireland. It is one of the best preserved medieval structures in Ireland with the remains of other ancient castles found at Olderfleet, Cam's, Shane's, Glenarm, Garron Tower, Red Bay and Dunluce Castle, notable for its dramatic location on a rocky outcrop.