In European elections, the member state of Poland is subdivided into constituencies. However, the number of seats in each subconstituency is not decided until after the election. Poland therefore is sometimes treated as a single constituency for purposes of reportage.
The 2004 European election was the sixth election to the European Parliament. However, as Poland had only joined the European Union earlier that month, it was the first election European election held in that state. The election took place on 13 June.
The elections resulted in a heavy defeat for the governing Alliance of the Democratic Left and Labor Union parties, although the very low turnout makes a direct comparison with national election results difficult. As expected the most successful party was the Civic Platform. Second place was taken by the strongly anti-EU League of Polish Families.