Peakirk is a civil parish in the city of Peterborough, Cambridgeshire in the United Kingdom. For local government purposes it forms part of Newborough ward; for parliamentary purposes it falls within Peterborough constituency. In 2001, the parish had a population of 321 persons and 139 households.
Saint Pega (died c. 719) the sister of Saint Guthlac of Crowland, had a hermitage here. The parish church is dedicated to St Pega and the name of the village is derived from "Pega's church".
The Wildfowl and Wetlands Trust, founded by Sir Peter Scott in 1946 to preserve and maintain Britain's many species of waterfowl, had a reserve here until 2001.
Glinton cum Peakirk Church of England ( Voluntary Aided) Primary School is situated in neighbouring Glinton; secondary pupils attend Arthur Mellows Village College also in Glinton.
Peakirk also has an unusual war memorial. An oak-panelled frame with 48 photographs and details of the service of all who served from the village during world war one, and not just those who died.