Peterborough is a cathedral city in Cambridgeshire, England, located 74 miles north of London on the River Nene. The city forms its own unitary authority known as the City of Peterborough district within the ceremonial county of Cambridgeshire. According to the 2021 census, the Peterborough urban area had a population of 192,178, with the wider district estimated at 219,510 residents in 2023.
As a cathedral city, Peterborough holds formal status linked to its ecclesiastical importance. The River Nene, which flows through the city, has historically provided water transport and shaped the local landscape and economy.