Dunglass Castle, situated in West Dunbartonshire, is a ruinous castle, originally constructed during 1400–1542. A large section of high wall remains, to approximately 7–8 metres high, with a mixture of original and newer construction. A small conical dovecot also exists on the south wall but it is now completely ruined. The castle and courtyard stone was taken in 1735 to use in repair of the quay following an order by the Commissioners of Supply. Near the west end of the wall, and outside the south wall is a small landing place appearing to have been protected by a hoarding – some corbels for which still remains. At the North-West corner of the enclosure is a dwelling house, partly old, possibly dating back to 1590, but mostly modern – the interior is wholly so.