Risca (Welsh: Rhisga) is a town of approximately 11,700 people in south-east Wales, within the Caerphilly County Borough and the historic boundaries of Monmouthshire. Risca has a railway station, opened on the Ebbw Valley Railway in February 2008, after a gap of 46 years. It is split into two communities; Risca East and Risca West.
The town lies at the south-eastern edge of the South Wales Coalfield and the town has been shaped by mining, together with other heavy industries, for many centuries.
Risca is home to Ty-Sign, which is a large housing estate built in the early 1960s as a satellite village for the then new Llanwern steelworks. Risca has a rural aspect and is surrounded to the east and west by several extensively wooded hills including Mynydd Machen (1,188 ft/362m) and Twmbarlwm (1,375 ft/419m) which attract tourists for the hillwalking and mountain bikers to Cwmcarn Forest Drive.