Don Valley (UK Parliament constituency)

Don Valley is a former constituency in South Yorkshire, represented in the House of Commons of the UK Parliament. It elected one Member of Parliament at least once every five years using the first-past-the-post system of voting.

Further to the completion of the 2023 periodic review of Westminster constituencies, the seat was subject to boundary changes which included gain of the Isle of Axholme in the Borough of North Lincolnshire and the loss of Conisbrough to the new constituency of Rawmarsh and Conisbrough. As a consequence, it was renamed Doncaster East and the Isle of Axholme, and was first contested at the 2024 general election.