The River Don is a river in South Yorkshire and the East Riding of Yorkshire, England. It rises in the Pennines, west of Dunford Bridge, and flows for 69 miles (111 km) eastwards, through the Don Valley, via Penistone, Sheffield, Rotherham, Mexborough, Conisbrough, Doncaster and Stainforth. It originally joined the Trent, but was re-engineered by Cornelius Vermuyden as the Dutch River in the 1620s, and now joins the River Ouse at Goole. Don Valley is a UK parliamentary constituency near the Doncaster stretch of the river.

The East Riding of Yorkshire, often abbreviated to the East Riding or East Yorkshire, is a ceremonial county in the Yorkshire and the Humber region of England. It borders North Yorkshire to the north and west, South Yorkshire to the south-west, and Lincolnshire to the south across the Humber Estuary. The city of Kingston upon Hull is the largest settlement.