Usk (Welsh:Brynbuga) is a small town in Monmouthshire, south-east Wales, situated 10 miles (16 km) northeast of Newport.

It is located on the River Usk, which is spanned by an arched stone bridge at the western entrance to the town. A castle above the town overlooks the ancient crossing point. It developed as a small market town, with some industry including the making of Japanware, and a notable prison. In recent years Usk has become known for its history of success in Britain in Bloom competitions, winning the Large Village award in 2005. The resident population of the town in 2001 was 2,318, increasing to 2,834 at the 2011 census.