UK Elections Info
Monmouthshire
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Data Last Updated: 7 August 2025
Application Last Amended: 20 July 2024
This website is considered to be an archive in the public interest.
| 18 December 1832 | 3,738 | ||
| Tory | Unopposed |   | |
| Whig | Unopposed |   | |
| 15 January 1835 | 3,714 | ||
| Conservative Party | Unopposed |   | |
| Whig | Unopposed |   | |
| 2 August 1837 | 4,347 | ||
| Conservative Party | Unopposed |   | |
| Whig | Unopposed |   | |
| February 1841 Resignation of William Williams. (Chiltern Hundreds) | |||
| 9 February 1841 | 4,395 | ||
| Conservative Party | Unopposed |   | |
| 5 July 1841 | 4,395 | ||
| Conservative Party | Unopposed |   | |
| Conservative Party | Unopposed |   | |
| 3 September 1841 Appointment of Lord Granville Somerset as Chancellor of the Duchy of Lancaster. | |||
| 24 September 1841 | 4,395 | ||
| Conservative Party | Unopposed |   | |
| 7 August 1847 | 3,376/5,286 | 63.87 | |
| Conservative Party | 2,334 | 69.14 | |
| Conservative Party | 2,230 | 66.05 | |
| Conservative Party | 2,187 | 64.78 | |
| Majority | 43 | 1.27 | |
| 23 February 1848 Death of Lord Granville Somerset. | |||
| 24 March 1848 | |||
| Conservative Party | Unopposed |   | |
| 14 July 1852 | 4,973 | ||
| Conservative Party | Unopposed |   | |
| Conservative Party | Unopposed |   | |
| 2 April 1857 | 5,099 | ||
| Conservative Party | Unopposed |   | |
| Conservative Party | Unopposed |   | |
| 4 May 1859 | 5,073 | ||
| Conservative Party | Unopposed |   | |
| Conservative Party | Unopposed |   | |
| 23 June 1859 Resignation of Edward Somerset. (Hempholme) | |||
| 1 July 1859 | |||
| Conservative Party | Unopposed |   | |
| 18 July 1865 | 4,909 | ||
| Conservative Party | Unopposed |   | |
| Conservative Party | Unopposed |   | |
| Boundary Change | |||
| 26 November 1868 | 5,981/7,971 | 75.03 | |
| Conservative Party | 3,761 | 62.88 | |
| Conservative Party | 3,525 | 58.94 | |
| Liberal Party | 2,338 | 39.09 | |
| Majority | 1,187 | 19.85 | |
| 24 February 1871 Resignation of Poulett Somerset. (Chiltern Hundreds) | |||
| 4 March 1871 | |||
| Conservative Party | Unopposed |   | |
| 2 February 1874 | 7,630 | ||
| Conservative Party | Unopposed |   | |
| Conservative Party | Unopposed |   | |
| 2 March 1874 Appointment of Lord Henry Somerset as Comptroller of Her Majesty's Household. | |||
| 17 March 1874 | 7,630 | ||
| Conservative Party | Unopposed |   | |
| 5 April 1880 | 12,769/8,518 | 149.91 | |
| Conservative Party | 3,529 | 55.27 | |
| Conservative Party | 3,294 | 51.59 | |
| Liberal Party | 3,019 | 47.29 | |
| Liberal Party | 2,927 | 45.85 | |
| Majority | 275 | 2.15 | |
| New | |||
| 4 July 2024 | 50,844/74,823 | 67.95 | |
| Labour Party | 21,010 | 41.32 | |
| Conservative & Unionist Party | 17,672 | 34.76 | |
| Reform UK | 5,438 | 10.70 | |
| Green Party | 2,357 | 4.64 | |
| Liberal Democrats | 2,279 | 4.48 | |
| Plaid Cymru | 1,273 | 2.50 | |
| Independent | 457 | 0.90 | |
| True & Fair | 255 | 0.50 | |
| Heritage | 103 | 0.20 | |
| Majority | 3,338 | 6.57 | |