| Competition: | Prima Categoria |
| Season: | 1912–13 |
| Winners: | Pro Vercelli 5th title |
| Prevseason: | 1911–12 |
| Nextseason: | 1913–14 |
The 1912–13 Prima Categoria season was won by Pro Vercelli.
For the first time, sides from southern Italy were admitted.
Football in Italy expanded its popularity during the 10’s, but the expedition of the Italian football team to the Stockholm Olympics had a disappointing very poor result. In summer 1912, minor clubs took control over the Italian Football Federation, and imposed a championship reform. New vicepresidents Mr.Valvassori and Mr.Faroppa created a new format with more clubs but more groups, regionalising the tournament.
The round robin was abolished. The old main tournament was split in two groups of six clubs, with solely ten matchdays, while the Oriental group became a full member of the championship.
Best two clubs of each group went to the final group. Last clubs should be relegated.
An experimental Southern section was introduced.
Played on October 20, 1912, in Turin.Novara was promoted.
Played on October 20, 1912.
The match between Lambro Milano and Racing Libertas Milano was later canceled and repeated:
Played on November 1, 1912.Racing Libertas was promoted.
Played on October 20, 1912.
Played on October 27, 1912.
Novara, Racing Libertas Milan, Alba Roma, Juventus Audax Roma and Pro Roma were admitted to the 1a Categoria. The losers went to regional 2nd Category Promotion.
The results of the matches between sides that were in the same qualification rounds were valid also for the final round (but not the goals scored in those matches). Due to this, the sides began the final round with a point bonus:
Note:solely 8 matches really played instead of 10.
Pro Vercelli advanced to National Final.
Virtus Juventusque advanced to Central Final.
Lazio advanced to Central Final.
Naples won 5–3 on aggregate, advanced to Central-Southern Final.
Lazio won 6–1 on aggregate, advanced to Central-Southern Final.
Lazio won 3–2 on aggregate, advanced to the National Final.[1]
Played on 1 June 1913, in Genoa.