Notional results for a UK general election on 5 May 2005 Northern Ireland - by vote share
| Ranking | Constituency | Winning party | Vote share |
| 1 | Belfast West | SF | 70.5% |
| 2 | Strangford | DUP | 56.5% |
| 3 | North Antrim | DUP | 54.8% |
| 4 | Lagan Valley | DUP | 54.7% |
| 5 | North Down | UUP | 50.4% |
| 6 | East Antrim | DUP | 49.6% |
| 7 | Belfast East | DUP | 49.1% |
| 8 | Mid Ulster | SF | 47.6% |
| 9 | Foyle | SDLP | 46.3% |
| 10 | Belfast North | DUP | 45.6% |
| 11 | South Down | SDLP | 44.7% |
| 12 | East Londonderry | DUP | 42.9% |
| 13 | Newry and Armagh | SF | 41.4% |
| 14 | West Tyrone | SF | 38.9% |
| 15 | South Antrim | DUP | 38.2% |
| 16 | Fermanagh and South Tyrone | SF | 38.2% |
| 17 | Upper Bann | DUP | 37.5% |
| 18 | Belfast South | SDLP | 32.3% |
Estimates of the 2005 general election result in new constituencies
Colin Rallings and Michael Thrasher, then at the University of Plymouth, 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.
The Elections Centre, established by Professors Colin Rallings and Michael Thrasher, moved to the University of Exeter in 2003.