The European Parliament election of 2004 took place on 12–13 June 2004.
The Olive Tree was the most voted list in Sicily with 28.6%, followed by Forza Italia (21.5%), National Alliance (14.5%) and the Union of Christian and Centre Democrats (14.0%). Raffaele Lombardo, who was elected to the European Parliament for the Christian Democrats, left that party in 2005 to launch the Movement for Autonomy, which would have become a stable political force in the region.
| Parties | votes | votes (%) | ||
|---|---|---|---|---|
| The Olive Tree | align=right valign=top | 646,267 | align=right valign=top | 28.6 |
| Forza Italia | 486,080 | 21.5 | ||
| National Alliance | 328,697 | 14.5 | ||
| Union of Christian and Centre Democrats | 315,818 | 14.0 | ||
| Communist Refoundation Party | 82,054 | 3.6 | ||
| Popular Alliance – UDEUR | 61,364 | 2.7 | ||
| Italy of Values–Civil Society–Occhetto | 42,002 | 1.9 | ||
| United Socialists for Europe | 39,942 | 1.8 | ||
| Federation of the Greens | 38,671 | 1.7 | ||
| Party of Italian Communists | 38,187 | 1.7 | ||
| Bonino List | 32,027 | 1.4 | ||
| Social Alternative | 28,849 | 1.3 | ||
| New Country | 24,726 | 1.1 | ||
| Consumers' List | 24,233 | 1.1 | ||
| Italian Republican Party–The Liberals-Sgarbi | 22,417 | 1.0 | ||
| Others | 49,048 | 3.2 | ||
| Total | 2,260,382 | 100.0 |