It is 7.5 miles (12 kilometres) south of Lisburn, and about 14 miles south-west of Belfast, on the main road between Ballynahinch and Hillsborough. In the 2001 Census the village had a population of 1,148. Annahilt has a distinctive drumlin setting, with a small wooded estate on a ridge to the west, and panoramic views on the approaches to the village.

Annahilt's has a primary school, shop(a mace, hair dressers and part-time post office), a Scout Hall, an Orange Hall, a residential care home and a park. There is a business park to the north, on the Glebe Road. Annahilt also has a three-star caravan site, known as the 'Lakeside View Caravan Park', on the Magheraconluce Road.