2005 Polish parliamentary election

2005 Polish parliamentary election

← 2001 25 September 2005 2007 →
All 460 seats in the Sejm 231 seats needed for a majority
Turnout	40.57%
First party Second party Third party   Leader Jarosław Kaczyński Donald Tusk Andrzej Lepper Party PiS PO SRP Last election 9.5%, 44 seats 12.7%, 65 seats 10.2%, 53 seats Seats won 155 133 56 Seat change 111 68 3 Popular vote 3,185,714 2,849,269 1,347,355 Percentage 27.0% 24.1% 11.4% Swing 17.5pp 11.4pp 1.2pp   Fourth party Fifth party Sixth party   Leader Wojciech Olejniczak Marek Kotlinowski Waldemar Pawlak Party SLD LPR PSL Last election 41.0%, 216 seats 7.9%, 38 seats 9.0%, 42 seats Seats won 55 34 25 Seat change 161 4 17 Popular vote 1,335,257 940,762 821,656 Percentage 11.3% 8.0% 7.0% Swing 29.7pp 0.1pp 2pp
Seats won by Sejm District
Government before election Belka cabinet SLD—UP Government after election Marcinkiewicz cabinet PiS—SRP—LPR

Politics of Poland
Government Constitution of Poland Law Human rights
Legislature Parliament of Poland Current Parliament Sejm Marshal Szymon Hołownia (PL2050) Deputy Marshals Senate Marshal Małgorzata Maria Kidawa- Błońska (PO) Deputy Marshals
Executive President of Poland Andrzej Duda (I) Prime Minister of Poland Donald Tusk (PO) Cabinet Ministries
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Parliamentary elections were held in Poland on 25 September 2005. All 460 members of the Sejm and 100 senators of the Senate were elected. The election resulted in a sweeping victory for two opposition parties: the right-wing, national-conservative Law and Justice (PiS) and the centre-right, liberal-conservative Civic Platform (PO). The incumbent centre-left government of the Democratic Left Alliance (SLD) was soundly defeated. PiS won 155 seats and PO 133, while the governing SLD was reduced to fourth place with 55 seats, behind Andrzej Lepper's Self-Defence party, which won 56 seats.

Normally, this would have made PiS leader Jarosław Kaczyński Prime Minister. However, he declined the post so as not to prejudice his twin brother Lech's chances for the presidential election held later in October. In his place, Law and Justice nominated Kazimierz Marcinkiewicz for the post. Outgoing Prime Minister Marek Belka failed to win a seat in Łódź.

In the Senate, PiS won 49 seats and PO 34 of the 100 seats, leaving eight other parties with the remaining 17 seats. The SLD won no seats in the Senate.

In the subsequent presidential elections, Lech Kaczyński of the PiS defeated PO leader Donald Tusk.