| UK european elections 2004 | | PARTY | % | +/-% | TOTAL | 1999 | +/- | TOTAL |
| Conservative | 26.7 | -9.0 | 4397090 | 0 | -8 | 27 |
| Labour | 22.6 | -5.4 | 3718683 | 0 | -6 | 19 |
| UK Independence Party | 16.1 | 9.2 | 2650768 | 0 | 10 | 12 |
| Liberal Democrat | 14.9 | 2.3 | 2452327 | 0 | 2 | 12 |
| Green | 6.3 | 0.0 | 1028283 | 0 | 2 | 2 |
| British National Party | 4.9 | 3.9 | 808200 | 0 | 0 | 0 |
| Respect - The Unity Coalition | 1.5 | 1.5 | 252216 | 0 | 0 | 0 |
| Scottish National Party | 1.4 | -1.3 | 231505 | 0 | 0 | 2 |
| Plaid Cymru | 1.0 | -0.9 | 159888 | 0 | 0 | 1 |
| English Democrats Party | 0.8 | 0.8 | 130056 | 0 | 0 | 0 |
| Liberal Party | 0.6 | -0.3 | 96325 | 0 | 0 | 0 |
| Independent - Bell | 0.6 | 0.6 | 93028 | 0 | 0 | 0 |
| Scottish Socialist Party | 0.4 | 0.0 | 61356 | 0 | 0 | 0 |
| Christian Peoples Alliance | 0.4 | 0.4 | 56771 | 0 | 0 | 0 |
| Senior Citizens Party | 0.3 | 0.3 | 42861 | 0 | 0 | 0 |
| The Countryside Party | 0.3 | 0.3 | 42107 | 0 | 0 | 0 |
| Independent - Herron | 0.2 | 0.2 | 39658 | 0 | 0 | 0 |
| Pensioners Party | 0.2 | 0.2 | 33501 | 0 | 0 | 0 |
| Operation Christian Vote | 0.1 | 0.1 | 21056 | 0 | 0 | 0 |
| ProLife | 0.1 | 0.1 | 20393 | 0 | 0 | 0 |
| Forward Wales | 0.1 | 0.1 | 17280 | 0 | 0 | 0 |
| Independent - Ellis | 0.1 | 0.1 | 14762 | 0 | 0 | 0 |
| People's Party for Better Government | 0.1 | 0.1 | 13776 | 0 | 0 | 0 |
| Peace Party | 0.1 | 0.1 | 12572 | 0 | 0 | 0 |
| The Common Good | 0.1 | 0.1 | 8650 | 0 | 0 | 0 |
| Independent - Neal | 0.1 | 0.1 | 8318 | 0 | 0 | 0 |
| Scottish Wind Watch | 0.0 | 0.0 | 7255 | 0 | 0 | 0 |
| Christian Democratic Party | 0.0 | 0.0 | 6821 | 0 | 0 | 0 |
| Independent - Rhodes | 0.0 | 0.0 | 5671 | 0 | 0 | 0 |
| Independent - Naisbitt | 0.0 | 0.0 | 5137 | 0 | 0 | 0 |
| Independent - Tait | 0.0 | 0.0 | 3624 | 0 | 0 | 0 |
| Independent - Rogers | 0.0 | 0.0 | 2615 | 0 | 0 | 0 |