1920–21 Prima Categoria
The 1920–21 Prima Categoria season was won by Pro Vercelli.Liguria
Verdicts
Rivarolese and Sestrese were admitted to the 1a Categoria.Qualifications
Liguria
Classification
Rivarolese was demoted by the Federazione Italiana Giuoco Calcio after incidents caused by its supporters during the match Rivarolese-Savona. Rivarolese's remaining matches were all considered forfeits. The side was readmitted to the championship for the following season.Piedmont
Group A
;Classification
;Results TableGroup B
;Classification
;Results Table;Repetition
US Torinese qualified for the Northern Italy semifinals.Lombardy
Group A
;Classification
;Results TableGroup B
;Classification
;Results TableGroup C
;Classification
;Results Table
;Relegation playoffGroup D
;Classification
;Results Table
;Relegation playoff
The match was voided due to irregularities.
;RepetitionGroup E
;Classification
;Results TableGroup F
;Classification
;Results TableFinal round
;Classification
;Results TableVeneto
Group A
;Classification
;Results Table
;Classification
;Results Table
- The home teams are read down the left hand side while the away teams are indicated along the top.
Final round
;Classification
;Results Table
- The home teams are read down the left hand side while the away teams are indicated along the top.
Emilia-Romagna
Group A
;Classification
;Results tableGroup B
;Classification
;Results tableSince the aggregate rule wasn't applied, a tie-breaker was needed.
;Tie-breakerQualification play-off
Semifinals
Group A
Classification
Results table
Group B
Classification
Results table
Qualification playoff
Group C
Classification
Results table
Qualification play-off
A tie-breaker was due, but both Legnano and Torino decided to retire from the championship.Group D
Classification
Results table
Finals
Round 1
Bologna F.C. advanced directly to Round 2 due to Torino and Legnano's retirement.Round 2
Southern Italy
Qualifications
Tuscany
Classification
Results table
Lazio
Classification
Results table
Campania
Group A
;Classification
;Results tableGroup B
;Classification
;Results tableFinal round
;Classification
;Results tableSemifinals
Group A
Classification
Results table
Group B
Classification
Results table
Final
National final
Footnotes
