Doncaster is a city located in South Yorkshire, England. It serves as the administrative centre of the City of Doncaster metropolitan borough and is recognized as the second largest settlement in South Yorkshire, following Sheffield. The city derives its name from the River Don.
Situated in the Don Valley on the western edge of the Humberhead Levels and east of the Pennines, the city is historically noted for its railway and racing heritage. According to the 2021 census, the city had a population of 87,455, while the wider metropolitan borough recorded a population of 308,100.