# Roscommon (UK Parliament constituency)

County Roscommon was a UK Parliament constituency in Ireland. The constituency sent two MPs to Westminster from the Acts of Union 1800 until the constituency was split into Roscommon North and Roscommon South in 1885.

## Boundaries

This constituency comprised the whole of County Roscommon.

## Members of Parliament

| Year | 1st Member | 1st Member | 1st Party | 2nd Member | 2nd Member | 2nd Party |
| 1801 | | Arthur French (I) | | | Thomas Mahon | |
| 1802 | | Arthur French (I) | | | Edward King | |
| 1806 | | Arthur French (I) | | | Stephen Mahon | |
| 1821 | | Arthur French (II) | Whig | | Stephen Mahon | |
| 1826 | | Arthur French (II) | Whig | | Robert King | Tory |
| 1830 | | Arthur French (II) | Whig | | Owen O'Conor | Whig |
| 1831 | | Arthur French (II) | Whig | | Denis O'Conor | Repeal Association |
| 1832 | | Fitzstephen French | Whig | | Denis O'Conor | Repeal Association |
| 1847 | | Fitzstephen French | Whig | | Oliver Dowell John Grace | Whig |
| 1852 | | Fitzstephen French | Ind. Irish | | Oliver Dowell John Grace | Ind. Irish |
| 1857 | | Fitzstephen French | Whig | | Oliver Dowell John Grace | Whig |
| 1859 | | Fitzstephen French | Liberal | | Thomas William Goff | Conservative |
| 1860 | | Fitzstephen French | Liberal | | Charles Owen O'Conor | Liberal |
| 1873 | | Charles French | Liberal | | Charles Owen O'Conor | Liberal |
| 1874 | | Charles French | Home Rule League | | Charles Owen O'Conor | Home Rule League |
| 1880 | | Andrew Commins | Parnellite Home Rule League | | James O'Kelly | Parnellite Home Rule League |
| 1885 | Constituency divided: see North Roscommon and South Roscommon | Constituency divided: see North Roscommon and South Roscommon | Constituency divided: see North Roscommon and South Roscommon | Constituency divided: see North Roscommon and South Roscommon | Constituency divided: see North Roscommon and South Roscommon | Constituency divided: see North Roscommon and South Roscommon |

## Elections
### Elections in the 1830s

General election 1830: Roscommon :
| Party | Party | Candidate | Votes | % |
| | Whig | Arthur French | Unopposed | Unopposed |
| | Whig | Owen O'Conor | Unopposed | Unopposed |
| Registered electors | Registered electors | Registered electors | 629 | |
| | Whig hold | Whig hold | Whig hold | Whig hold |
| | Whig gain from Tory | Whig gain from Tory | Whig gain from Tory | Whig gain from Tory |
General election 1831: Roscommon :
| Party | Party | Candidate | Votes | % |
| | Whig | Arthur French | 514 | 38.4 |
| | Whig | Owen O'Conor | 479 | 35.8 |
| | Tory | William Lloyd | 346 | 25.8 |
| Majority | Majority | Majority | 133 | 10.0 |
| Turnout | Turnout | Turnout | c. 670 | c. 91.8 |
| Registered electors | Registered electors | Registered electors | 729 | |
| | Whig hold | Whig hold | Whig hold | Whig hold |
| | Whig hold | Whig hold | Whig hold | Whig hold |
O'Conor's death caused a by-election.
By-election, 25 July 1831: Roscommon :
| Party | Party | Candidate | Votes | % |
| | Irish Repeal | Denis O'Conor | Unopposed | Unopposed |
| | Irish Repeal gain from Whig | Irish Repeal gain from Whig | Irish Repeal gain from Whig | Irish Repeal gain from Whig |
General election 1832: Roscommon :
| Party | Party | Candidate | Votes | % |
| | Whig | Fitzstephen French | Unopposed | Unopposed |
| | Irish Repeal | Denis O'Conor | Unopposed | Unopposed |
| Registered electors | Registered electors | Registered electors | 1,776 | |
| | Whig hold | Whig hold | Whig hold | Whig hold |
| | Irish Repeal gain from Whig | Irish Repeal gain from Whig | Irish Repeal gain from Whig | Irish Repeal gain from Whig |
General election 1835: Roscommon :
| Party | Party | Candidate | Votes | % |
| | Whig | Fitzstephen French | 985 | 39.4 |
| | Irish Repeal (Whig) | Denis O'Conor | 955 | 38.2 |
| | Conservative | Thomas Johnston Barton | 523 | 20.9 |
| | Conservative | Arthur Browne | 40 | 1.6 |
| Turnout | Turnout | Turnout | 1,453 | 78.0 |
| Registered electors | Registered electors | Registered electors | 1,864 | |
| Majority | Majority | Majority | 30 | 1.2 |
| | Whig hold | Whig hold | Whig hold | Whig hold |
| Majority | Majority | Majority | 432 | 17.3 |
| | Irish Repeal hold | Irish Repeal hold | Irish Repeal hold | Irish Repeal hold |
General election 1837: Roscommon :
| Party | Party | Candidate | Votes | % |
| | Whig | Fitzstephen French | Unopposed | Unopposed |
| | Irish Repeal (Whig) | Denis O'Conor | Unopposed | Unopposed |
| Registered electors | Registered electors | Registered electors | 2,070 | |
| | Whig hold | Whig hold | Whig hold | Whig hold |
| | Irish Repeal hold | Irish Repeal hold | Irish Repeal hold | Irish Repeal hold |

### Elections in the 1840s

General election 1841: Roscommon :
| Party | Party | Candidate | Votes | % | ±% |
| | Whig | Fitzstephen French | Unopposed | Unopposed | Unopposed |
| | Irish Repeal | Denis O'Conor | Unopposed | Unopposed | Unopposed |
| Registered electors | Registered electors | Registered electors | 1,059 | | |
| | Whig hold | Whig hold | Whig hold | Whig hold | Whig hold |
| | Irish Repeal hold | Irish Repeal hold | Irish Repeal hold | Irish Repeal hold | Irish Repeal hold |
O'Conor was appointed a Lord Commissioner of the Treasury, requiring a by-election.
By-election, 21 July 1846: Roscommon :
| Party | Party | Candidate | Votes | % | ±% |
| | Irish Repeal | Denis O'Conor | Unopposed | Unopposed | Unopposed |
| | Irish Repeal hold | Irish Repeal hold | Irish Repeal hold | Irish Repeal hold | Irish Repeal hold |
General election 1847: Roscommon :
| Party | Party | Candidate | Votes | % | ±% |
| | Whig | Fitzstephen French | 205 | 41.8 | N/A |
| | Whig | Oliver Dowell John Grace | 170 | 34.7 | N/A |
| | Irish Repeal | Valentine O'Connor Blake | 115 | 23.5 | N/A |
| Majority | Majority | Majority | 55 | 11.2 | N/A |
| Turnout | Turnout | Turnout | 245 (est) | 18.3 (est) | N/A |
| Registered electors | Registered electors | Registered electors | 1,341 | | |
| | Whig hold | Whig hold | Swing | N/A | |
| | Whig gain from Irish Repeal | Whig gain from Irish Repeal | Swing | N/A | |

### Elections in the 1850s

General election 1852: Roscommon :
| Party | Party | Candidate | Votes | % | ±% |
| | Independent Irish | Fitzstephen French | Unopposed | Unopposed | Unopposed |
| | Independent Irish | Oliver Dowell John Grace | Unopposed | Unopposed | Unopposed |
| Registered electors | Registered electors | Registered electors | 2,236 | | |
| | Independent Irish gain from Whig | Independent Irish gain from Whig | Independent Irish gain from Whig | Independent Irish gain from Whig | Independent Irish gain from Whig |
| | Independent Irish gain from Whig | Independent Irish gain from Whig | Independent Irish gain from Whig | Independent Irish gain from Whig | Independent Irish gain from Whig |
General election 1857: Roscommon :
| Party | Party | Candidate | Votes | % | ±% |
| | Whig | Fitzstephen French | Unopposed | Unopposed | Unopposed |
| | Whig | Oliver Dowell John Grace | Unopposed | Unopposed | Unopposed |
| Registered electors | Registered electors | Registered electors | 2,890 | | |
| | Whig gain from Independent Irish | Whig gain from Independent Irish | Whig gain from Independent Irish | Whig gain from Independent Irish | Whig gain from Independent Irish |
| | Whig gain from Independent Irish | Whig gain from Independent Irish | Whig gain from Independent Irish | Whig gain from Independent Irish | Whig gain from Independent Irish |
General election 1859: Roscommon :
| Party | Party | Candidate | Votes | % | ±% |
| | Liberal | Fitzstephen French | 1,930 | 40.6 | N/A |
| | Conservative | Thomas William Goff | 1,541 | 32.4 | New |
| | Liberal | Edward King-Tenison | 1,280 | 26.9 | N/A |
| | Liberal | Patrick Dignan | 3 | 0.0 | N/A |
| Turnout | Turnout | Turnout | 2,377 (est) | 71.1 (est) | N/A |
| Registered electors | Registered electors | Registered electors | 3,345 | | |
| Majority | Majority | Majority | 389 | 8.2 | N/A |
| | Liberal hold | Liberal hold | Swing | N/A | |
| Majority | Majority | Majority | 261 | 5.5 | N/A |
| | Conservative gain from Liberal | Conservative gain from Liberal | Swing | N/A | |

### Elections in the 1860s

On petition, Goff was unseated and a by-election was called.
By-election, 26 March 1860: Roscommon :
| Party | Party | Candidate | Votes | % | ±% |
| | Liberal | Charles Owen O'Conor | Unopposed | Unopposed | Unopposed |
| | Liberal gain from Conservative | Liberal gain from Conservative | Liberal gain from Conservative | Liberal gain from Conservative | Liberal gain from Conservative |
General election 1865: Roscommon :
| Party | Party | Candidate | Votes | % | ±% |
| | Liberal | Fitzstephen French | Unopposed | Unopposed | Unopposed |
| | Liberal | Charles Owen O'Conor | Unopposed | Unopposed | Unopposed |
| Registered electors | Registered electors | Registered electors | 3,650 | | |
| | Liberal hold | Liberal hold | Liberal hold | Liberal hold | Liberal hold |
| | Liberal gain from Conservative | Liberal gain from Conservative | Liberal gain from Conservative | Liberal gain from Conservative | Liberal gain from Conservative |
General election 1868: Roscommon :
| Party | Party | Candidate | Votes | % | ±% |
| | Liberal | Fitzstephen French | Unopposed | Unopposed | Unopposed |
| | Liberal | Charles Owen O'Conor | Unopposed | Unopposed | Unopposed |
| Registered electors | Registered electors | Registered electors | 3,814 | | |
| | Liberal hold | Liberal hold | Liberal hold | Liberal hold | Liberal hold |
| | Liberal hold | Liberal hold | Liberal hold | Liberal hold | Liberal hold |

### Elections in the 1870s

French's death caused a by-election
By-election, 24 Jun 1873: Roscommon :
| Party | Party | Candidate | Votes | % | ±% |
| | Liberal | Charles French | Unopposed | Unopposed | Unopposed |
| Registered electors | Registered electors | Registered electors | 3,809 | | |
| | Liberal hold | Liberal hold | Liberal hold | Liberal hold | Liberal hold |
General election 1874: Roscommon :
| Party | Party | Candidate | Votes | % | ±% |
| | Home Rule | Charles Owen O'Conor | Unopposed | Unopposed | Unopposed |
| | Home Rule | Charles French | Unopposed | Unopposed | Unopposed |
| Registered electors | Registered electors | Registered electors | 3,710 | | |
| | Home Rule gain from Liberal | Home Rule gain from Liberal | Home Rule gain from Liberal | Home Rule gain from Liberal | Home Rule gain from Liberal |
| | Home Rule gain from Liberal | Home Rule gain from Liberal | Home Rule gain from Liberal | Home Rule gain from Liberal | Home Rule gain from Liberal |

### Elections in the 1880s

General election 1880: Roscommon :
| Party | Party | Candidate | Votes | % | ±% |
| | Parnellite Home Rule League | Andrew Commins | 1,585 | 31.1 | N/A |
| | Parnellite Home Rule League | James Joseph O'Kelly | 1,479 | 29.0 | N/A |
| | Home Rule | Charles Owen O'Conor | 1,107 | 21.7 | N/A |
| | Home Rule | Thomas Austin Patrick Mapother | 933 | 18.3 | N/A |
| Majority | Majority | Majority | 372 | 7.3 | N/A |
| Turnout | Turnout | Turnout | 2,552 (est) | 70.8 (est) | N/A |
| Registered electors | Registered electors | Registered electors | 3,602 | | |
| | Home Rule hold | Home Rule hold | Swing | N/A | |
| | Home Rule hold | Home Rule hold | Swing | N/A | |