Helensburgh (Scottish Gaelic: ''Baile Eilidh'') is a town in Argyll and Bute, Scotland. It lies on the north shore of the Firth of Clyde and the eastern shore of the entrance to the Gareloch.Helensburgh was formerly in Dumbarton District, but was re-allocated under local government reorganisation in 1996. Prior to 1975 it was part of the former Dunbartonshire.