Rosneath is a village in Argyll and Bute, Scotland.
It is situated within the G84 postcode district, which is within the Helensburgh post town.
G84 is the only postcode district within the Helensburgh post town.
The Helensburgh post town is within the Glasgow postcode area.
Administrative Ward: Lomond North
Administrative District: Argyll and Bute
Country: Scotland
UK Parliament: Argyll and Bute
NHS Local Health Authority: Highland