Sydenham is a village in Oxfordshire, England.
It is situated within the OX39 postcode district, which is within the Chinnor post town.
OX39 is the only postcode district within the Chinnor post town.
The Chinnor post town is within the Oxford postcode area.
Administrative Ward: Aston Rowant
Administrative District: South Oxfordshire
Administrative County: Oxfordshire
Country: England
UK Parliament: Henley
NHS Local Health Authority: South Central
NHS Region: Southern