The 1911-12 Prima Categoria was the fifteenth edition of the Italian Football Championship and the ninth since the re-brand to Prima Categoria. Champions for the fourth time in five seasons (punctuated only by their protest two season previous), were Pro Vercelli.
The competition was expanded by one to 14 Northern Italian clubs. Two regional round robin tournaments took place, with the winner of each of those then playing-off in a final.
Casale was admitted to the 1a Categoria Italian Championship.