Notional results for a UK general election on 5 May 2005 Yorkshire and The Humber, England - by turnout
| Ranking | Constituency | Winning party | Valid vote count | Electorate | Turnout (valid vote count / electorate) |
| 1 | Haltemprice and Howden | Con | 48,271 | 68,533 | 70.4% |
| 2 | Elmet and Rothwell | Lab | 53,187 | 76,229 | 69.8% |
| 3 | Keighley | Lab | 46,312 | 66,986 | 69.1% |
| 4 | Selby and Ainsty | Con | 47,833 | 69,407 | 68.9% |
| 5 | Shipley | Con | 46,551 | 68,363 | 68.1% |
| 6 | Sheffield, Hallam | LD | 45,852 | 67,522 | 67.9% |
| 7 | Harrogate and Knaresborough | LD | 49,212 | 73,815 | 66.7% |
| 8 | Skipton and Ripon | Con | 49,484 | 74,834 | 66.1% |
| 9 | Calder Valley | Lab | 47,656 | 72,174 | 66.0% |
| 10 | Pudsey | Lab | 44,309 | 67,196 | 65.9% |
| 11 | Thirsk and Malton | Con | 49,540 | 75,220 | 65.9% |
| 12 | Colne Valley | Lab | 50,430 | 77,264 | 65.3% |
| 13 | Leeds North East | Lab | 43,604 | 67,514 | 64.6% |
| 14 | Richmond (Yorks) | Con | 50,217 | 77,790 | 64.6% |
| 15 | York Outer | LD | 46,030 | 71,464 | 64.4% |
| 16 | Beverley and Holderness | Con | 49,689 | 77,424 | 64.2% |
| 17 | Scarborough and Whitby | Con | 46,912 | 73,806 | 63.6% |
| 18 | Leeds North West | LD | 41,572 | 66,231 | 62.8% |
| 19 | Brigg and Goole | Lab | 41,010 | 65,365 | 62.7% |
| 20 | Penistone and Stocksbridge | Lab | 42,179 | 67,969 | 62.1% |
| 21 | Cleethorpes | Lab | 43,587 | 70,746 | 61.6% |
| 22 | Wakefield | Lab | 41,990 | 68,333 | 61.4% |
| 23 | East Yorkshire | Con | 47,195 | 77,121 | 61.2% |
| 24 | Halifax | Lab | 39,773 | 65,179 | 61.0% |
| 25 | Batley and Spen | Lab | 44,744 | 73,601 | 60.8% |
| 26 | York Central | Lab | 39,907 | 65,817 | 60.6% |
| 27 | Dewsbury | Lab | 45,036 | 75,974 | 59.3% |
| 28 | Morley and Outwood | Lab | 41,389 | 70,788 | 58.5% |
| 29 | Sheffield, Heeley | Lab | 37,773 | 65,461 | 57.7% |
| 30 | Rother Valley | Lab | 40,597 | 70,370 | 57.7% |
| 31 | Huddersfield | Lab | 35,362 | 62,462 | 56.6% |
| 32 | Leeds East | Lab | 35,829 | 63,823 | 56.1% |
| 33 | Bradford West | Lab | 36,583 | 65,280 | 56.0% |
| 34 | Sheffield Central | Lab | 33,225 | 60,400 | 55.0% |
| 35 | Sheffield South East | Lab | 36,536 | 66,798 | 54.7% |
| 36 | Scunthorpe | Lab | 34,230 | 62,875 | 54.4% |
| 37 | Wentworth and Dearne | Lab | 38,533 | 70,879 | 54.4% |
| 38 | Hemsworth | Lab | 38,421 | 70,754 | 54.3% |
| 39 | Bradford East | Lab | 36,705 | 67,827 | 54.1% |
| 40 | Rotherham | Lab | 33,550 | 62,002 | 54.1% |
| 41 | Bradford South | Lab | 35,198 | 65,884 | 53.4% |
| 42 | Don Valley | Lab | 38,345 | 71,877 | 53.3% |
| 43 | Normanton, Pontefract and Castleford | Lab | 42,287 | 79,310 | 53.3% |
| 44 | Leeds West | Lab | 35,283 | 66,849 | 52.8% |
| 45 | Doncaster North | Lab | 37,765 | 71,750 | 52.6% |
| 46 | Doncaster Central | Lab | 37,774 | 72,587 | 52.0% |
| 47 | Great Grimsby | Lab | 32,964 | 63,711 | 51.7% |
| 48 | Sheffield, Brightside and Hillsborough | Lab | 33,230 | 66,476 | 50.0% |
| 49 | Barnsley East | Lab | 32,136 | 65,823 | 48.8% |
| 50 | Barnsley Central | Lab | 30,897 | 64,774 | 47.7% |
| 51 | Kingston upon Hull East | Lab | 32,753 | 68,805 | 47.6% |
| 52 | Kingston upon Hull North | Lab | 28,089 | 60,930 | 46.1% |
| 53 | Kingston upon Hull West and Hessle | Lab | 27,688 | 61,858 | 44.8% |
| 54 | Leeds Central | Lab | 34,008 | 76,713 | 44.3% |
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.