Clewer is a village in Berkshire, England.
It is situated within the SL4 postcode district, which is within the Windsor post town.
SL4 is the only postcode district within the Windsor post town.
The Windsor post town is within the Slough postcode area.
Administrative Ward: Clewer North
Administrative District: Windsor and Maidenhead
Country: England
UK Parliament: Windsor
NHS Local Health Authority: South Central
NHS Region: Southern