The Serbian Football Championship season of 1920–21 was the second championship organised by the Belgrade Football Subassociation after the 1920 season.
First League (1. Razred)
Second Leagues Banat League
Participating: Obilić Veliki Bečkerek Vašaš Veliki Bečkerek Viktorija Veliki Bečkerek ŽSE Žombolj ŽTK Žombolj Šveboše Žombolj DSK Debeljača KAC Velika Kikinda
Provincial League - Župa 1
Participating: Vojvodina Novi Sad NAK Novi Sad NSK Zemun ASK Zemun PSK Pančevo RSK Ruma
Provincial League - Župa 2
Participating: Zora Bijeljina Podrinje Bijeljina Jedinstvo Brčko Sloga Brčko Građanski Sremska Mitrovica Srpski SK Sremska Mitrovica Sloga Šabac Srpski mač Valjevo
Provincial League - Župa 2
Participating: Jedinstvo Vranje Moravac Leskovac Jug Bogdan Prokuplje Zlatibor Užice Šumadija Kragujevac PSK Požarevac
See also 1919–20 Serbian Football Championship Yugoslav First League Serbian SuperLiga
External links League table at RSSSF