PlusLiga (Polish: PlusLiga Siatkarzy), is the highest level of men's volleyball in Poland, a professional league competition for volleyball clubs located in this country. It is overseen by Profesjonalna Liga Piłki Siatkowej S.A. (PLPS S.A.). It is currently a 12 team league that plays a 22 game schedule from September to March. The regular season is followed by playoffs, with the winner earning the mistrzostwo Polski (little shield). It is one of the best volleyball leagues in Europe. According to the latest rankings of European volleyball leagues, compiled by the Confédération Européenne de Volleyball, the Polish league is ranked 3rd best.
The competition was called Klasa wydzielona, Ekstraklasa, 1 liga Seria A in 1954-2000. Since June 30, 2000 this is a professional league - Polska Liga Siatkówki.