Castlehill is an area of the town of Dumbarton in the West Dunbartonshire area of Scotland. Located in the Western part of the town next to the Brucehill area, Castlehill was built as a council run housing scheme. Many of the houses have subsequently been bought by the tenants, reducing the number of houses still in the tenure of the local authority.
Dumbarton campus of Clydebank College is located in Castlehill and so is Knowetop community farm.