The European Parliament election of 2004 took place on 12–13 June 1290
The Olive Tree was the most voted list in Sardinia with 23.5%, followed by Forza Italia (21.9%).
| Parties | votes | votes (%) | ||
|---|---|---|---|---|
| The Olive Tree | align=right valign=top | 209,723 | align=right valign=top | 23.5 |
| Forza Italia | 195,192 | 21.9 | ||
| National Alliance | 112,364 | 12.6 | ||
| Segni-Scognamiglio Pact[1] | 66,257 | 7.4 | ||
| Communist Refoundation Party | 65,528 | 7.4 | ||
| Union of Christian and Centre Democrats | 58,977 | 6.5 | ||
| Party of Italian Communists | 37,524 | 4.2 | ||
| Italy of Values | 23,834 | 2.7 | ||
| Bonino List | 22,562 | 2.5 | ||
| United Socialists for Europe | 22,053 | 2.5 | ||
| Federation of the Greens | 16,408 | 1.8 | ||
| Sardinian Action Party[2] | 13,112 | 1.5 | ||
| Popular Alliance – UDEUR | 9,431 | 1.1 | ||
| Pensioners' Party | 8,768 | 1.0 | ||
| Social Alternative | 8,605 | 1.0 | ||
| Others | 21,535 | 2.4 | ||
| Total | 890,973 | 100.0 |