[1] It is roughly halfway between Moffat and Lockerbie, and lies on the A74(M) motorway.
It was named after the prominent local landowning family, the Johnstones, who caused a bridge to be built there over the River Annan.
Johnstonebridge is in the parliamentary constituency of Dumfriesshire, Clydesdale and Tweeddale, David Mundell is the current Conservative Party member of parliament.
It is part of the South Scotland region in the Scottish Parliament, being in the constituency of Dumfriesshire.
Before Brexit, for the European Parliament its residents voted to elect MEP's for the Scotland constituency.