Notional results for a UK general election on 5 May 2005 Elections won by Liberal Democrat
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 | Majority |
| Twickenham | 71,444 | 72.3% | 26,696 | 51.6% | 9,965 |
| North Norfolk | 68,221 | 72.7% | 26,410 | 53.2% | 8,575 |
| Yeovil | 79,306 | 63.9% | 26,076 | 51.5% | 8,779 |
| Harrogate and Knaresborough | 73,815 | 66.7% | 25,639 | 52.1% | 7,980 |
| Kingston and Surbiton | 74,102 | 67.7% | 25,637 | 51.1% | 9,084 |
| Thornbury and Yate | 64,045 | 73.6% | 25,622 | 54.3% | 11,060 |
| Winchester | 71,253 | 71.9% | 25,621 | 50.0% | 6,524 |
| Taunton Deane | 81,767 | 69.3% | 25,159 | 44.4% | 1,868 |
| Lewes | 66,979 | 69.8% | 24,071 | 51.5% | 7,889 |
| Richmond Park | 69,566 | 73.2% | 23,771 | 46.7% | 3,613 |
| Cheadle | 72,103 | 68.7% | 23,671 | 47.8% | 3,672 |
| Oxford West and Abingdon | 75,715 | 67.1% | 23,418 | 46.1% | 6,816 |
| Somerton and Frome | 77,035 | 69.3% | 23,341 | 43.8% | 595 |
| North Devon | 72,171 | 68.3% | 22,869 | 46.4% | 5,276 |
| St Ives | 64,459 | 67.8% | 22,651 | 51.8% | 10,711 |
| Mid Dorset and North Poole | 62,730 | 72.1% | 22,596 | 50.0% | 5,931 |
| Westmorland and Lonsdale | 67,131 | 70.8% | 21,829 | 46.0% | 806 |
| South East Cornwall | 68,856 | 67.7% | 21,795 | 46.8% | 5,485 |
| St Austell and Newquay | 70,872 | 64.9% | 21,747 | 47.3% | 5,723 |
| Cambridge | 80,588 | 59.0% | 21,278 | 44.8% | 5,834 |
| Sheffield, Hallam | 67,522 | 67.9% | 21,253 | 46.4% | 7,416 |
| Newton Abbot | 66,766 | 68.9% | 20,967 | 45.6% | 4,830 |
| Hornsey and Wood Green | 76,630 | 61.8% | 20,512 | 43.3% | 2,395 |
| Sutton and Cheam | 64,281 | 67.2% | 20,255 | 46.9% | 2,689 |
| Chesterfield | 71,716 | 59.9% | 20,190 | 47.0% | 2,733 |
| Hereford and South Herefordshire | 69,022 | 66.1% | 19,793 | 43.4% | 1,089 |
| Chippenham | 69,443 | 66.9% | 19,704 | 42.4% | 2,183 |
| Colchester | 72,405 | 56.5% | 19,517 | 47.7% | 6,388 |
| Hazel Grove | 62,991 | 61.3% | 19,423 | 50.3% | 7,694 |
| Romsey and Southampton North | 66,353 | 66.4% | 19,217 | 43.6% | 204 |
| Berwick-upon-Tweed | 57,519 | 63.3% | 19,147 | 52.6% | 8,585 |
| Southport | 67,530 | 61.0% | 19,093 | 46.3% | 3,838 |
| Torbay | 75,272 | 60.2% | 18,943 | 41.8% | 2,727 |
| Cheltenham | 76,704 | 62.5% | 18,877 | 39.4% | 316 |
| Bath | 60,023 | 69.1% | 18,845 | 45.4% | 5,624 |
| Eastleigh | 74,167 | 64.4% | 18,313 | 38.3% | 534 |
| Cardiff Central | 61,079 | 59.2% | 17,991 | 49.8% | 5,593 |
| North Cornwall | 65,257 | 64.5% | 17,812 | 42.3% | 2,892 |
| Bristol West | 70,819 | 63.6% | 17,599 | 39.1% | 1,147 |
| Truro and Falmouth | 65,288 | 65.1% | 17,406 | 41.0% | 3,931 |
| Brecon and Radnorshire | 55,171 | 69.5% | 17,182 | 44.8% | 3,905 |
| Bermondsey and Old Southwark | 73,944 | 48.8% | 17,177 | 47.6% | 5,769 |
| York Outer | 71,464 | 64.4% | 16,904 | 36.7% | 203 |
| Carshalton and Wallington | 64,989 | 64.3% | 16,870 | 40.4% | 1,225 |
| Birmingham, Yardley | 71,986 | 54.5% | 16,485 | 42.0% | 2,864 |
| Manchester, Withington | 69,227 | 55.4% | 16,195 | 42.3% | 531 |
| Montgomeryshire | 46,655 | 66.3% | 15,548 | 50.3% | 7,048 |
| Portsmouth South | 64,306 | 57.4% | 15,370 | 41.6% | 2,955 |
| Leeds North West | 66,231 | 62.8% | 15,328 | 36.9% | 2,064 |
| Camborne and Redruth | 61,035 | 63.2% | 13,830 | 35.9% | 2,733 |
| Ceredigion | 52,514 | 68.0% | 13,045 | 36.5% | 218 |
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.
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.