Greenisland is a village in County Antrim, Northern Ireland. It lies 7 miles north-east of Belfast and 3 miles south-west of Carrickfergus. The village is on the coast of Belfast Lough and is named after a tiny islet to the west, the Green Island.
The village has two distinct areas, known locally as Upper Greenisland and Lower Greenisland after the upper Station Road and lower Station Road around which two parts are respectively located. Upper Greenisland stretches from Upper Road (B90) to the railway station at the bottom of Upper Station Road, includes Greenisland Primary School and features predominantly middle-class demographics and housing. Lower Greenisland runs from the railway station, down Station Road and ends at Shore Road (part of the A2 road). It features a large, predominantly working-class housing estate built during the 1950s and 1960s and includes Greenisland Library, Greenisland Community Centre, a number of churches, a small shopping parade at Glassillan Court and Silverstream Primary School. The village in its entirety stretches from the foot of the hill to the shore of Belfast Lough.