South Marston is a village in Wiltshire, England.
It is situated within the SN3 postcode district, which is within the Swindon post town.
The full list of postcode districts within the Swindon post town is as follows:
The Swindon post town is within the Swindon postcode area.
Administrative Ward: St Margaret and South Marston
Administrative District: Swindon
Country: England
UK Parliament: North Swindon
NHS Local Health Authority: South West
NHS Region: Southern