The 2021–22 I liga (also known as Fortuna I liga due to sponsorship reasons)[3] was the 74th season of the second tier domestic division in the Polish football league system since its establishment in 1949 and the 14th season of the Polish I liga under its current title.

A total of 18 teams participated, 14 of which competed in the league campaign during the previous season, while one to be relegated from the 2020–21 Ekstraklasa and the remaining three to be promoted from the 2020–21 II liga.

Note: The place taken by the team that played fewer matches than the opponents was underlined.

The winner of final match will be promoted to the Ekstraklasa for next season.

All matches will be played in a stadiums of team which occupied higher position in regular season.