The Firth of Clyde is the estuary of the River Clyde, from its upper tidal limit in Glasgow city centre to the outer firth in Argyll and Ayrshire. It includes the Mull of Kintyre, the sea lochs, and the islands of Arran, Bute, Great Cumbrae and some smaller islands.

See: Islands of the lower Firth of Clyde, Firth of Clyde Forum

Towns and villages along the shoreline