Mexborough is a town in the City of Doncaster in South Yorkshire, England. Situated between Manvers and Denaby Main, it lies on the River Don close to where it joins the River Dearne, and the A6023 road runs through the town. It is contiguous with the town of Swinton which is directly to the southwest immediately across the railway and Conisbrough to the east.

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.