Dumbartonshire (UK Parliament constituency)

Dunbartonshire
Former County constituency for the House of Commons
Subdivisions of Scotland	County of Dumbarton
1708–1950
Number of members	One
Replaced by	East Dunbartonshire West Dunbartonshire

Dunbartonshire was a county constituency of the House of Commons of Great Britain (at Westminster) from 1708 to 1801 and of the House of Commons of the Parliament of the United Kingdom (also Westminster) from 1801 to 1950. It elected one Member of Parliament (MP) using the first-past-the-post voting system.

The constituency was created to cover the county of Dumbarton (later Dunbarton) minus any parliamentary burgh or part thereof within the county. From 1832 to 1918, however, under the Representation of the People (Scotland) Act 1832, the Representation of the People (Scotland) Act 1868 and the Redistribution of Seats Act 1885, the boundaries of counties and burghs for purposes of parliamentary representation were not necessarily those for other purposes.

The Representation of the People Act 1918 brought constituency boundaries generally into alignment with local government boundaries established under the Local Government (Scotland) Act 1889 and subsequent related legislation, but there were later changes to local government boundaries which were not reflected in new constituency boundaries until 1950, the same year that the Dunbartonshire constituency was abolished, under the House of Commons (Redistribution of Seats) Act 1949.