The opposition party, Law and Justice won the election with 37.58% of the vote against the governing Civic Platform, which gained a 24.09% share.
Beata Szydło  became the new Prime Minister, succeeding Ewa Kopacz.
Law and Justice became the first party in Poland to win majority government in a free election, since 1991.
The other parties considered winners were two newcomer parties, Kukiz's Movement (third place) and Ryszard Petru's Modern party (4th place).

Two of the biggest losers were Civic Platform and the Polish People's Party.
PO suffered its worst result in a parliamentary election in ten years, ending eight years of political dominance.
The PSL, the junior partner in the outgoing government, had its worst result in 25 years (5.13%), just crossing the 5% threshold by a few thousand votes.
Another perceived loser was the Democratic Left Alliance, Poland's largest left-wing party, which failed to win a seat for the first time since the change of system.
The SLD ran as the largest partner of the United Left, which was 0.5% short of the 8% threshold for electoral alliances to win seats.

Notes
United Left was running as a coalition, therefore was subject to an 8% election threshold rather than 5% for single parties.
The opposition party, Law and Justice won the election with 37.58% of the vote against the governing Civic Platform, which gained a 24.09% share. Beata Szydło  became the new Prime Minister, succeeding Ewa Kopacz. Law and Justice became the first party in Poland to win majority government in a free election, since 1991. The other parties considered winners were two newcomer parties, Kukiz's Movement (third place) and Ryszard Petru's Modern party (4th place).
Two of the biggest losers were Civic Platform and the Polish People's Party. PO suffered its worst result in a parliamentary election in ten years, ending eight years of political dominance. The PSL, the junior partner in the outgoing government, had its worst result in 25 years (5.13%), just crossing the 5% threshold by a few thousand votes. Another perceived loser was the Democratic Left Alliance, Poland's largest left-wing party, which failed to win a seat for the first time since the change of system. The SLD ran as the largest partner of the United Left, which was 0.5% short of the 8% threshold for electoral alliances to win seats.
Notes
United Left was running as a coalition, therefore was subject to an 8% election threshold rather than 5% for single parties.
2015 Polish parliamentary election