Thorne is a market town and civil parish in the City of Doncaster in South Yorkshire, England. It was historically part of the West Riding of Yorkshire until 1974. It has a population of 16,592, increasing to 17,295 at the 2011 Census.

The City of Doncaster is a metropolitan borough with city status in South Yorkshire, England. It is named after its principal settlement, Doncaster, and includes the surrounding suburbs of Doncaster as well as numerous towns and villages. The district has large amounts of countryside; at 219 square miles (570 km2), it is the largest metropolitan borough in England by area.