St John's is a village in Surrey, England.
It is situated within the GU21 postcode district, which is within the Woking post town.
The full list of postcode districts within the Woking post town is as follows:
The Woking post town is within the Guildford postcode area.
Administrative Ward: St John's and Hook Heath
Administrative District: Woking
Administrative County: Surrey
Country: England
UK Parliament: Woking
NHS Local Health Authority: South East Coast
NHS Region: Southern