Parliamentary elections were held in Poland on 21 October 2007, after the Sejm voted for its own dissolution on 7 September. The election took place two years before the maximum tenure of four years, with the previous elections having been in September 2005. The early elections were a result of serious allegations of massive corruption on the part of Andrzej Lepper, leader of the Self-Defense of the Republic of Poland, whose party served as a junior coalition partner to the government of Prime Minister Jarosław Kaczyński. All 460 seats in the Sejm and all 100 seats in the Senate were up for election.
The election was won by the largest opposition group, Civic Platform (PO), which soundly defeated the ruling Law and Justice (PiS) party and its allies. Throughout the campaign, polls showed conflicting results as to which of the two parties had the greater support, yet by the closing week the polls had swung in favour of Civic Platform. Three other political groups won election into the Sejm, the centre-left Left and Democrats coalition, the agrarian Polish People's Party, and the tiny German Minority group. Both of Law and Justice's former minor coalition partners, the League of Polish Families and the Self-Defense of the Republic of Poland suffered an enormous voter backlash, failing to cross the 5% electoral threshold in order to enter the Sejm. Consequently, both parties lost all of their seats.
This electoral calendar 2007 lists the national/federal direct elections held in 2007 in the de jure and de facto sovereign states and their dependent territories. Referendums are included, although they are not elections. By-elections are not included.
The following elections occurred in the year 2007.