Serie C champions and promotions since its establishment, including the competition under previous names, are as follows:

Parentheses denote other teams promoted.

• 1926–27 – Monza, (Carrarese), (Ponziana), (Terni)
• 1927–28 – Edera Trieste, (Rivarolese), (Saronno), (Viareggio), (Seregno), (Forlì)
• 1928–29 – Vogherese, Vigevanesi, Pavia, Clarense, Mirandolese, Rovigo, Empoli

Parentheses denote other teams promoted.

• 1929–30 – Udinese, (Libertas), (Derthona), (Palermo)
• 1930–31 – Comense, Vigevanesi, Cagliari
• 1931–32 – Giovanni Grion, Messina, Sampierdarenese
• 1932–33 – Initially: Perugia, Foggia, Vezio Parducci Viareggio, Following expansion: Catanzarese, Seregno, SPAL, Pavia, Vicenza, Derthona
• 1933–34 – Aquila, Pisa, Lucchese, Catania
• 1934–35 – Taranto, Siena

Parentheses denote other teams promoted.