Gorseinon is a town within the City and County of Swansea, Wales, near the Loughor estuary. It was a small village until the late 19th century when it grew around the coal mining and tinplate industries. It is situated in the north west of Swansea City Centre, around 6 miles (10 km) north west of the city centre. Gorseinon is a local government community with an elected town council.
The population of the Gorseinon town council area in the 2011 Census is 8,693. However, the ONS defines an area called the Gorseinon Urban Area which comprises all of the continuous built up area in and around Gorseinon. This area includes Gorseinon, Loughor, Garden Village and Penllergaer and has a population of 20,581.