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Dunbartonshire was a county constituency of the House of Commons of the Parliament of Great Britain (Westminster) from 1708 to 1801 and of the Parliament of the United Kingdom (also Westminster) from 1801 to 1950, electing one Member of Parliament (MP).

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.

For the period 1832 to 1918 boundary details below are nominal, and for the period 1918 to 1950 they are those applicable in 1918.

For the 1708 (first) general election and every subsequent election of the Parliament of Great Britain the Dumbartonshire constituency consisted of the county of Dumbarton minus the burgh of Dumbarton, which was a component of the Clyde Burghs constituency.

In 1801 the Parliament of Great Britain was merged with the Parliament of Ireland to form the Parliament of the United Kingdom. The Dumbartonshire constituency retained its boundaries as a constituency of the Parliament of Great Britain for the 1802 (first) general election of the new parliament and for the general elections of 1806, 1807, 1812, 1818, 1820, 1826, 1830 and 1831.

Nominally, the constituency had the same boundaries for the 1832 general election, but the burgh of Dumbarton was now a component of Kilmarnock Burghs. 1832 boundaries were used also in the general elections of 1835, 1837, 1841, 1847, 1852, 1857, 1859, 1865, 1868, 1874, 1880, 1885, 1886, 1892, 1895, 1900, 1906, January 1910, and December 1910.

For the 1918 general election the constituency was defined as covering the county of Dunbarton minus the burghs of Dumbarton and Clydebank, which comprised Dumbarton Burghs. 1918 boundaries were used also in the general elections of 1922, 1923, 1924, 1929, 1931, 1935 and 1945.^[1]

For the 1950 general election new constituency boundaries divided the county of Dunbarton between the East Dunbartonshire and West Dunbartonshire constituencies, both entirely within the county.^[1]

• 1708 John Campbell
• 1722 Mungo Haldane
• 1725 John Campbell
• 1727 John Campbell, later Duke of Argyll
• 1761 Sir Archibald Edmonstone
• 1780 Lord Frederick Campbell
• 1781 George Keith Elphinstone, later Viscount Keith
• 1790 Sir Archibald Edmonstone
• 1796 William Cunninghame Bontine
• 1797 Alexander Telfer Smollett
• 1799 James Colquhoun
• 1806 Henry Glassford
• 1806 Charles Edmonstone
• 1807 Henry Glassford
• 1810 Archibald Campbell-Colquhoun
• 1821 John Buchanan
• 1826 John Campbell
• 1830 Lord Montagu William Graham
• 1832 John Campbell Colquhoun
• 1835 Alexander Dennistoun
• 1837 Sir James Colquhoun
• 1841 Alexander Smollett
• 1859 Patrick Boyle Smollett
• 1868 Sir Archibald Orr-Ewing
• 1892 John Sinclair, later Baron Pentland
• 1895 Alexander Wylie
• 1906 James Dundas White
• 1910 Arthur Acland Allen
• 1918 Sir William Hannay Raeburn
• 1923 William Henry Porteous Martin
• 1924 David Pinkerton Fleming
• 1926 John Gibb Thom
• 1929 Willie Brooke
• 1931 John Gibb Thom
• 1932 Archibald Douglas Cochrane
• 1936 Thomas Cassells
• 1941 Adam McKinlay

This short section requires expansion.

1. ^ ^{a b} Boundaries of Parliamentary Constituencies 1885-1972 (ISBN 0-900178-09-4), F. W. S. Craig, 1972