Abertillery (English pronunciation: æbərtɨˈlɛəri) is the largest town of the Ebbw Fach valley in what was the historic county of Monmouthshire, South Wales. Following local government reorganisation it became part of the Blaenau Gwent County Borough administrative area.
The surrounding landscape borders the Brecon Beacons National Park and the Blaenavon World heritage Site. Formerly a major coal mining centre the Abertillery area has been transformed in recent decades. The local landscape has long been known for its varied natural beauty.
Situated on the A467 the town is 15 miles (22 km) north of the M4 and 5 miles (8 km) south of the A465 “Heads of the Valleys” trunk road. It is about 25 miles by road from Cardiff and 47 miles from Bristol.
According to the 2001 Census and information gathered by The Welsh Language Board, 1,146 (9.9%) of Abertillery speaks Welsh. In the 2011 Census, this figure dropped to 7.2%, a 2.7 percentage point drop.