Mendham is a village in Suffolk, England.
It is situated within the IP20 postcode district, which is within the Harleston post town.
IP20 is the only postcode district within the Harleston post town.
The Harleston post town is within the Ipswich postcode area.
Administrative Ward: Fressingfield
Administrative District: Mid Suffolk
Administrative County: Suffolk
Country: England
UK Parliament: Central Suffolk and North Ipswich
NHS Local Health Authority: East of England
NHS Region: North, Midlands and the East