Chalfont St Peter is a village in Buckinghamshire, England.
It is situated within the SL9 postcode district, which is within the Gerrards Cross post town.
SL9 is the only postcode district within the Gerrards Cross post town.
The Gerrards Cross post town is within the Slough postcode area.
Administrative Ward: Central
Administrative District: Chiltern
Administrative County: Buckinghamshire
Country: England
UK Parliament: Chesham and Amersham
NHS Local Health Authority: South Central
NHS Region: Southern