Gastard is a village in Wiltshire, England.
It is situated within the SN13 postcode district, which is within the Corsham post town.
The full list of postcode districts within the Corsham post town is as follows:
The Corsham post town is within the Swindon postcode area.
Administrative Ward: Corsham Without and Box Hill
Administrative District: Wiltshire
Country: England
UK Parliament: Chippenham
NHS Local Health Authority: South West
NHS Region: Southern