A cathedral city and unitary authority in Cambridgeshire, England, United Kingdom. / A town in South Australia, Australia. / A town on the Great Ocean Road, Victoria, Australia.

a historic area associated with the City and Diocese of Peterborough in England, at one time part of Northamptonshire. It became an administrative county in 1888, and was merged with Huntingdonshire in 1965, becoming the county of Huntingdon and Peterborough.

A county in Southern Ontario, Canada, with its county seat in Peterborough, an independent city.

A short-lived former county of East Anglia, England. Created from the merger of the Soke of Peterborough and the county of Huntingdonshire. Created in 1965 and absorbed into Cambridgeshire in 1974.