1921 Polish Football Championship was the 2nd edition of the Polish Football Championship (Non-League) and 1st completed season ended with the selection of a winner. The championship was decided in final tournament played among five teams. The champions were Cracovia, who won their 1st Polish title.

In the Second Polish Republic, there was not a national, Second Division, as we know it today, although the creation of the second division was proposed on several occasions. On Sunday, 26 September 1937 in Częstochowa, a conference of regional teams from across the nation took place, to discuss the creation of the league. Officials of several clubs arrived, such as Brygada Częstochowa, Gryf Toruń, Śmigły Wilno, Rewera Stanisławów, Dąb Katowice, Unia Sosnowiec, Strzelec Janowa Dolina, and WKS Grodno. Also, invited were officials of HCP Poznań, Podgorze Kraków, Naprzód Lipiny and Union Touring Łódź, but for unknown reasons they did not show up. The officials talked about creation of a National B-League, but nothing came out of this project. Instead, in the years 1921-1939, several Voivodeships held their own games and those leagues were known as A-Classes. In 1927, the elite Polish Football League was created, which by the late 1930s consisted of 10 teams. The teams that did not make it to the Ekstraklasa, played in the A-Classes.