# South Roscommon (UK Parliament constituency)

South Roscommon was a UK Parliament constituency in Ireland, returning one Member of Parliament from 1885 to 1922.
Prior to the 1885 general election the area was part of the Roscommon constituency. From 1922, on the establishment of the Irish Free State, it was not represented in the UK Parliament.

## Boundaries

This constituency comprised the southern part of County Roscommon. In 1918, the boundaries were redrawn to reflect transfers made under the 1898 Local Government Act between County Roscommon and County Galway, with the district electoral division of Rosmoylan being transferred into Roscommon, and part of the urban district of Ballinasloe being transferred into Galway.
1885–1918: The baronies of Athlone, Ballintober South, Ballymoe, Castlereagh and Moycarn, and that part of the barony of Roscommon contained within the parishes of Cloonfinlough and Kilbride and the townlands of Coggalkeenagh, Coggalmore, Coggalstack, Coggaltonroe and Coggalfortyacres in the parish of Lissonuffy.
1918–1922: The existing South Roscommon constituency (excluding the part contained within the administrative county of Galway), and that part of the existing North Galway constituency contained within the administrative county of Roscommon.

## Members of Parliament

| Election | Member | Party |
| 1885 | Andrew Commins | Nationalist |
| 1886 | Andrew Commins | Nationalist |
| 1890 | Andrew Commins | Anti-Parnellite |
| 1892 | Luke Hayden | Parnellite |
| 1895 | Luke Hayden | Parnellite |
| 1897 (by-election) | John Patrick Hayden | Parnellite |
| 1900 | John Patrick Hayden | Nationalist |
| 1906 | John Patrick Hayden | Nationalist |
| 1910, Jan | John Patrick Hayden | Nationalist |
| Dec. 1910 | John Patrick Hayden | Nationalist |
| 1918 | Harry Boland | Sinn Féin |
| 1922 | UK constituency abolished | UK constituency abolished |

## Elections
### Elections in the 1880s

1885 general election: South Roscommon :
| Party | Party | Candidate | Votes | % | ±% |
| | Irish Parliamentary | Andrew Commins | 6,033 | 94.7 | |
| | Irish Conservative | William John Talbot | 338 | 5.3 | |
| Majority | Majority | Majority | 5,695 | 89.4 | |
| Turnout | Turnout | Turnout | 6,371 | 68.1 | |
| Registered electors | Registered electors | Registered electors | 9,351 | | |
| | Irish Parliamentary win (new seat) | Irish Parliamentary win (new seat) | Irish Parliamentary win (new seat) | Irish Parliamentary win (new seat) | Irish Parliamentary win (new seat) |
1886 general election: South Roscommon :
| Party | Party | Candidate | Votes | % | ±% |
| | Irish Parliamentary | Andrew Commins | Unopposed | Unopposed | Unopposed |
| Registered electors | Registered electors | Registered electors | 9,351 | | |
| | Irish Parliamentary hold | Irish Parliamentary hold | Irish Parliamentary hold | Irish Parliamentary hold | Irish Parliamentary hold |

### Elections in the 1890s

1892 general election: South Roscommon :
| Party | Party | Candidate | Votes | % | ±% |
| | Irish National League | Luke Hayden | 3,815 | 63.0 | N/A |
| | Irish National Federation | Andrew Commins | 2,244 | 37.0 | N/A |
| Majority | Majority | Majority | 1,571 | 26.0 | N/A |
| Turnout | Turnout | Turnout | 6,059 | 64.3 | N/A |
| Registered electors | Registered electors | Registered electors | 9,417 | | |
| | Irish National League gain from Irish Parliamentary | Irish National League gain from Irish Parliamentary | Swing | N/A | |
1895 general election: South Roscommon :
| Party | Party | Candidate | Votes | % | ±% |
| | Irish National League | Luke Hayden | 3,398 | 58.2 | −4.8 |
| | Irish National Federation | John Dillon | 2,444 | 41.8 | +4.8 |
| Majority | Majority | Majority | 954 | 16.4 | −9.6 |
| Turnout | Turnout | Turnout | 5,842 | 62.1 | −2.2 |
| Registered electors | Registered electors | Registered electors | 9,407 | | |
| | Irish National League hold | Irish National League hold | Swing | −4.8 | |
Hayden dies, causing a by-election.
By-election, 1897: South Roscommon :
| Party | Party | Candidate | Votes | % | ±% |
| | Irish National League | John Patrick Hayden | Unopposed | Unopposed | Unopposed |
| Registered electors | Registered electors | Registered electors | 9,472 | | |
| | Irish National League hold | Irish National League hold | Irish National League hold | Irish National League hold | Irish National League hold |

### Elections in the 1900s

1900 general election: South Roscommon :
| Party | Party | Candidate | Votes | % | ±% |
| | Irish Parliamentary | John Patrick Hayden | Unopposed | Unopposed | Unopposed |
| Registered electors | Registered electors | Registered electors | 8,980 | | |
| | Irish Parliamentary hold | Irish Parliamentary hold | Irish Parliamentary hold | Irish Parliamentary hold | Irish Parliamentary hold |
1906 general election: South Roscommon :
| Party | Party | Candidate | Votes | % | ±% |
| | Irish Parliamentary | John Patrick Hayden | Unopposed | Unopposed | Unopposed |
| Registered electors | Registered electors | Registered electors | 8,811 | | |
| | Irish Parliamentary hold | Irish Parliamentary hold | Irish Parliamentary hold | Irish Parliamentary hold | Irish Parliamentary hold |

### Elections in the 1910s

January 1910 general election: South Roscommon :
| Party | Party | Candidate | Votes | % | ±% |
| | Irish Parliamentary | John Patrick Hayden | Unopposed | Unopposed | Unopposed |
| Registered electors | Registered electors | Registered electors | 8,980 | | |
| | Irish Parliamentary hold | Irish Parliamentary hold | Irish Parliamentary hold | Irish Parliamentary hold | Irish Parliamentary hold |
December 1910 general election: South Roscommon :
| Party | Party | Candidate | Votes | % | ±% |
| | Irish Parliamentary | John Patrick Hayden | Unopposed | Unopposed | Unopposed |
| Registered electors | Registered electors | Registered electors | 8,980 | | |
| | Irish Parliamentary hold | Irish Parliamentary hold | Irish Parliamentary hold | Irish Parliamentary hold | Irish Parliamentary hold |
1918 general election: South Roscommon :
| Party | Party | Candidate | Votes | % | ±% |
| | Sinn Féin | Harry Boland | 10,685 | 71.6 | New |
| | Irish Parliamentary | John Patrick Hayden | 4,233 | 28.4 | N/A |
| Majority | Majority | Majority | 6,452 | 43.2 | N/A |
| Turnout | Turnout | Turnout | 14,918 | 67.5 | N/A |
| Registered electors | Registered electors | Registered electors | 22,093 | | |
| | Sinn Féin gain from Irish Parliamentary | Sinn Féin gain from Irish Parliamentary | Swing | N/A | |