Southwick is a village in Wiltshire, England.
It is situated within the BA14 postcode district, which is within the Trowbridge post town.
BA14 is the only postcode district within the Trowbridge post town.
The Trowbridge post town is within the Bath postcode area.
Administrative Ward: Southwick
Administrative District: Wiltshire
Country: England
UK Parliament: South West Wiltshire
NHS Local Health Authority: South West
NHS Region: Southern