Notional results for a UK general election on 5 May 2005 Elections contested by Ulster Unionist Party
A notional general election to the 54th Parliament of the United Kingdom with an electorate of 40,611,844, having 24,814,623 valid votes.
| Constituency | Electorate | Turnout | Votes | Vote share | Position |
| Fermanagh and South Tyrone | 66,415 | 73.5% | 8,869 | 18.2% | 3rd |
| Mid Ulster | 62,088 | 73.2% | 4,853 | 10.7% | 4th |
| West Tyrone | 59,842 | 72.7% | 2,981 | 6.9% | 5th |
| Newry and Armagh | 71,771 | 70.6% | 7,025 | 13.9% | 4th |
| Foyle | 68,758 | 66.3% | 1,091 | 2.4% | 5th |
| South Down | 73,175 | 65.8% | 4,775 | 9.9% | 4th |
| Belfast West | 53,536 | 64.5% | 779 | 2.3% | 4th |
| North Antrim | 73,938 | 62.1% | 6,637 | 14.5% | 3rd |
| Upper Bann | 71,645 | 62.0% | 11,381 | 25.6% | 2nd |
| Belfast South | 52,218 | 61.3% | 7,263 | 22.7% | 3rd |
| East Londonderry | 58,461 | 60.7% | 7,498 | 21.1% | 2nd |
| Lagan Valley | 70,238 | 60.6% | 9,172 | 21.5% | 2nd |
| Belfast East | 52,899 | 58.3% | 9,275 | 30.1% | 2nd |
| Belfast North | 52,535 | 58.1% | 2,154 | 7.1% | 4th |
| South Antrim | 66,580 | 57.0% | 11,059 | 29.1% | 2nd |
| East Antrim | 57,966 | 54.8% | 8,462 | 26.6% | 2nd |
| North Down | 59,358 | 54.4% | 16,268 | 50.4% | 1st |
| Strangford | 68,570 | 54.0% | 7,872 | 21.3% | 2nd |
Turnout as calculated by the House of Commons Library, is the total number of votes cast and not spoiled, divided by the size of the electorate.
Under section 13(b) of the Representation of the People Act 1985, a candidate gaining 5% or less of the vote share will forfeit their deposit.
Estimates of the 2005 general election result in new constituencies
Professors Colin Rallings and Michael Thrasher, at The Elections Centre of the University of Exeter, produced estimates of the 2005 general election result as if the new constituencies recommended by the separate Parliamentary Boundary Commissions for England, Wales and Northern Ireland had then been in existence.