Back is a village in the Outer Hebrides, Scotland.
It is situated within the HS2 postcode district, which is within the Isle of Lewis post town.
HS2 is the only postcode district within the Isle of Lewis post town.
The Isle of Lewis post town is within the Outer Hebrides postcode area.
Administrative Ward: Loch a Tuath
Administrative District: Eilean Siar
Country: Scotland
UK Parliament: West Suffolk
NHS Local Health Authority: Western Isles