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The OÖ Liga is a league competition, in which 16 football clubs from Upper Austria participate. The championship title is played between these clubs in 30 rounds, each team plays against all other teams in one home and one away match. The matches are drawn before each season. The best-placed team at the end of the season is made Upper Austrian Champion and advances to the Regional League Central. The number of relegated team from the OÖ Liga is variable and depends on the number of teams that descend from the Regional League Central. This depends on which association the relegated team from the first divisionbelongs, too. Together with the two champions of the ''Landesliga Ost'' and ''Landesliga West'' as well as the relegated teams from the Regional League Central, making up a league with 16 teams. Therefore, the number of relegated teams varies from 2 to 4 teams, spread out on a regional basis in the ''Landesliga Ost'' and ''Landesliga West''.2020–21 member clubs
* SV Zebau Bad Ischl * SV Bad Schallerbach * ASKÖ Donau Linz * Union Edelweiss Linz * SPG SV Friedburg/Pöndorf * SV Grieskirchen * SV Grün-Weiß Micheldorf * Union Mondsee * ASKÖ Oedt * DSG Union Perg * SPG Pregarten * Union St. Florian * Union St. Martin im Mühlkreis * ASK St. Valentin * SV Wallern * Union Weißkirchen/AllhamingReferences
{{UEFA fourth leagues Football competitions in Austria Football in Austria