Notional results for a UK general election on 5 May 2005 North East, England - by majority
| Constituency | Winning party | Valid votes | Majority (votes) | Majority (%) |
| Easington | Lab | 32,322 | 18,874 | 58.4% |
| Washington and Sunderland West | Lab | 32,458 | 17,060 | 52.6% |
| Houghton and Sunderland South | Lab | 37,105 | 16,986 | 45.8% |
| North Durham | Lab | 37,341 | 16,781 | 44.9% |
| Sedgefield | Lab | 40,599 | 18,198 | 44.8% |
| South Shields | Lab | 32,130 | 13,368 | 41.6% |
| Gateshead | Lab | 35,021 | 14,245 | 40.7% |
| Middlesbrough | Lab | 32,099 | 12,476 | 38.9% |
| North Tyneside | Lab | 39,935 | 14,929 | 37.4% |
| Jarrow | Lab | 35,074 | 12,749 | 36.3% |
| North West Durham | Lab | 39,509 | 13,443 | 34.0% |
| Stockton North | Lab | 37,928 | 12,742 | 33.6% |
| Redcar | Lab | 38,861 | 12,116 | 31.2% |
| Wansbeck | Lab | 36,809 | 10,581 | 28.7% |
| Bishop Auckland | Lab | 38,128 | 10,047 | 26.4% |
| Darlington | Lab | 39,797 | 10,417 | 26.2% |
| Sunderland Central | Lab | 37,064 | 9,464 | 25.5% |
| Blyth Valley | Lab | 35,773 | 8,527 | 23.8% |
| Berwick-upon-Tweed | LD | 36,406 | 8,585 | 23.6% |
| Newcastle upon Tyne Central | Lab | 32,554 | 7,509 | 23.1% |
| Hartlepool | Lab | 35,436 | 7,478 | 21.1% |
| Newcastle upon Tyne East | Lab | 33,320 | 6,987 | 21.0% |
| Middlesbrough South and East Cleveland | Lab | 43,737 | 8,096 | 18.5% |
| Newcastle upon Tyne North | Lab | 40,845 | 6,878 | 16.8% |
| Blaydon | Lab | 41,818 | 5,748 | 13.7% |
| Stockton South | Lab | 43,423 | 5,834 | 13.4% |
| Hexham | Con | 41,197 | 4,957 | 12.0% |
| Tynemouth | Lab | 47,123 | 5,490 | 11.7% |
| City of Durham | Lab | 44,364 | 3,274 | 7.4% |
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.