Notional results for a UK general election on 5 May 2005 South West, England - by turnout
| Ranking | Constituency | Winning party | Valid vote count | Electorate | Turnout (valid vote count / electorate) |
| 1 | West Dorset | Con | 53,225 | 69,643 | 76.4% |
| 2 | Thornbury and Yate | LD | 47,160 | 64,045 | 73.6% |
| 3 | Mid Dorset and North Poole | LD | 45,220 | 62,730 | 72.1% |
| 4 | North Somerset | Con | 51,736 | 72,098 | 71.8% |
| 5 | North East Somerset | Con | 46,416 | 64,934 | 71.5% |
| 6 | Torridge and West Devon | Con | 50,906 | 71,448 | 71.2% |
| 7 | Forest of Dean | Con | 47,640 | 67,241 | 70.8% |
| 8 | Tiverton and Honiton | Con | 51,332 | 72,888 | 70.4% |
| 9 | Christchurch | Con | 46,807 | 66,535 | 70.3% |
| 10 | Stroud | Lab | 53,775 | 76,677 | 70.1% |
| 11 | Central Devon | Con | 46,880 | 67,121 | 69.8% |
| 12 | Totnes | Con | 46,735 | 67,039 | 69.7% |
| 13 | North Wiltshire | Con | 44,897 | 64,580 | 69.5% |
| 14 | South Dorset | Lab | 48,584 | 70,002 | 69.4% |
| 15 | North Dorset | Con | 48,956 | 70,632 | 69.3% |
| 16 | Taunton Deane | LD | 56,649 | 81,767 | 69.3% |
| 17 | Somerton and Frome | LD | 53,350 | 77,035 | 69.3% |
| 18 | Kingswood | Lab | 44,647 | 64,530 | 69.2% |
| 19 | Bath | LD | 41,466 | 60,023 | 69.1% |
| 20 | Newton Abbot | LD | 46,012 | 66,766 | 68.9% |
| 21 | Bristol North West | Lab | 48,851 | 71,024 | 68.8% |
| 22 | Salisbury | Con | 45,444 | 66,311 | 68.5% |
| 23 | North Devon | LD | 49,268 | 72,171 | 68.3% |
| 24 | South West Devon | Con | 46,931 | 68,789 | 68.2% |
| 25 | East Devon | Con | 47,672 | 70,105 | 68.0% |
| 26 | St Ives | LD | 43,691 | 64,459 | 67.8% |
| 27 | Wells | Con | 52,965 | 78,234 | 67.7% |
| 28 | South East Cornwall | LD | 46,586 | 68,856 | 67.7% |
| 29 | The Cotswolds | Con | 50,451 | 75,035 | 67.2% |
| 30 | Chippenham | LD | 46,445 | 69,443 | 66.9% |
| 31 | Weston-Super-Mare | Con | 48,977 | 74,571 | 65.7% |
| 32 | Devizes | Con | 42,813 | 65,563 | 65.3% |
| 33 | Truro and Falmouth | LD | 42,480 | 65,288 | 65.1% |
| 34 | St Austell and Newquay | LD | 46,001 | 70,872 | 64.9% |
| 35 | South West Wiltshire | Con | 45,454 | 70,349 | 64.6% |
| 36 | North Cornwall | LD | 42,098 | 65,257 | 64.5% |
| 37 | Exeter | Lab | 49,574 | 77,049 | 64.3% |
| 38 | Bridgwater and West Somerset | Con | 50,988 | 79,643 | 64.0% |
| 39 | Poole | Con | 42,144 | 65,891 | 64.0% |
| 40 | Yeovil | LD | 50,665 | 79,306 | 63.9% |
| 41 | Bristol West | LD | 45,056 | 70,819 | 63.6% |
| 42 | Camborne and Redruth | LD | 38,577 | 61,035 | 63.2% |
| 43 | Bristol East | Lab | 42,266 | 67,036 | 63.0% |
| 44 | Gloucester | Lab | 46,821 | 74,918 | 62.5% |
| 45 | Cheltenham | LD | 47,904 | 76,704 | 62.5% |
| 46 | Filton and Bradley Stoke | Con | 41,243 | 66,042 | 62.4% |
| 47 | Tewkesbury | Con | 46,152 | 74,165 | 62.2% |
| 48 | North Swindon | Lab | 42,811 | 70,415 | 60.8% |
| 49 | Torbay | LD | 45,348 | 75,272 | 60.2% |
| 50 | Bristol South | Lab | 43,967 | 74,520 | 59.0% |
| 51 | South Swindon | Lab | 42,626 | 72,284 | 59.0% |
| 52 | Bournemouth East | Con | 41,835 | 70,952 | 59.0% |
| 53 | Plymouth, Moor View | Lab | 39,960 | 68,574 | 58.3% |
| 54 | Plymouth, Sutton and Devonport | Lab | 40,245 | 72,505 | 55.5% |
| 55 | Bournemouth West | Con | 36,613 | 67,955 | 53.9% |
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.