Garnswllt is a village in Swansea, Wales.
It is situated within the SA18 postcode district, which is within the Ammanford post town.
SA18 is the only postcode district within the Ammanford post town.
The Ammanford post town is within the Swansea postcode area.
Administrative Ward: Mawr
Administrative District: Swansea
Country: Wales
UK Parliament: Gower