2009–10 Ekstraklasa
sports season

The 2009–10 Ekstraklasa was the 84th season of the Polish Football Championship, the 76th season of the highest tier domestic division in the Polish football league system since its establishment in 1927 and the 2nd season of the Ekstraklasa under its current title. The league is operated by the Ekstraklasa S.A.
The season was played as a round-robin tournament. It began on 31 July 2009 and concluded on 15 May 2010. The champions were Lech Poznań.
Teams
Due to several non-competitive events between last and this season, the team exchange among the two highest football divisions of Poland was only partially determined by the 2008–09 league tables.
ŁKS Łódź were denied a license by the Polish FA because of financial issues. ŁKS filed several appeals against this decision, but were eventually left without any success.
First League 2008–09 champions Widzew Łódź were not permitted to advance by the Polish FA after their involvement in the Polish corruption scandal. The club had its initial appeals rejected, however, an Arbitration Tribunal later returned a verdict in the club's favor which led the club to file a request for immediate reinstatement to the Ekstraklasa.
The decisions had a significant influence on the relegation and promotion of teams.
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