Dumbarton District was a district council area which existed from 1975 to 1996. It was one of 19 district councils that delivered a range of local level services within the wider area of Strathclyde Region, which over this period was one of the 12 regions into which Scotland was divided.
Dumbarton was one of the five district council areas within the Dunbarton sub-region of Strathclyde, and it was formed from the western part of the traditional county of Dunbartonshire. For an explanation of the subtly different spellings of Dumbarton (town), Dumbarton (district), Dunbartonshire (county) and Dunbarton (sub-region), see our Dunbartonshire. feature.
The result was a district that included Dumbarton, Helensburgh and the west side of Loch Lomond. It was bordered by the districts of Argyll, Clydebank, Renfrew and Inverclyde in Strathclyde; plus the Stirling District in Central Region.
When regions and districts disappeared from the scene in a major reorganisation of Scottish local government in 1996, the district council area of Dumbarton was split between the unitary council areas of Argyll & Bute and West Dunbartonshire, two of the 32 unitary council areas into which Scotland has since been divided.