Barnwell is a suburb of Cambridge in England. The population of the Barnwell ward of Cambridge City Council at the 2011 census was 1,967. It lies northeast of the city, with Cambridge Airport located immediately to the east. It forms part of the ecclesiastical parish of St Andrew the Less and was the site of Barnwell Priory.

Barnwell Priory was an Augustinian priory at Barnwell in Cambridgeshire, founded as a house of Canons Regular. The only surviving parts are 13th-century claustral building, which is a Grade II* listed, and remnants found in the walls, cellar and gardens of Abbey House.