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.
- 1935–36 – Venezia, Cremonese, Spezia, Catanzaro
- 1936–37 – Padova, Vigevano, Sanremese, Anconitana, Taranto
- 1937–38 – SPAL, Fanfulla Lodi, Casale, Siena, Salernitana
- 1938–39 – Brescia, Catania
- 1939–40 – Reggiana, Vicenza, Maceratese
- 1940–41 – Prato, Fiumana
- 1941–42 – Cremonese, Juventina Palermo
- 1942–43 – Varese, Pro Gorizia
- 1943–45 – no national competition due to World War II
- 1945–46 – Mestrina, Prato, Perugia, Alba Ala Roma, Benevento, Lecce, Leone Palermo
- 1946–47 – Magenta, Vita Nova P.S. Pietro, Bolzano, Centese, Nocerina
- 1947–48 – competed amongst 18 regional leagues, no promotion to Serie B, no overall champions
- 1948–49 – Fanfulla Lodi, Udinese, Prato, Avellino
- 1949–50 – Seregno, Treviso, Anconitana, Messina
- 1950–51 – Monza, Marzotto Valdagno, Piombino, Juve Stabia
- 1951–52 – Cagliari
- 1952–53 – Pavia, (Alessandria)
- 1953–54 – Parma, (ArsenalTaranto)
- 1954–55 – Bari, (Livorno)
- 1955–56 – Venezia, (Sambenedettese)
- 1956–57 – Prato, (Lecco)
- 1957–58 – Reggiana, (Vigevano)
- 1958–59 – OZO Mantova, Catanzaro
- 1959–60 – Pro Patria, Prato, Foggia
- 1960–61 – Modena, Lucchese, Cosenza
- 1961–62 – Triestina, Cagliari, Foggia
- 1962–63 – Varese, Prato, Potenza
- 1963–64 – Reggiana, Livorno, Trani
- 1964–65 – Novara, Pisa, Reggina
- 1965–66 – Savona, Arezzo, Salernitana
- 1966–67 – Monza, Perugia, Bari
- 1967–68 – Como, Cesena, Ternana
- 1968–69 – Piacenza, Arezzo, Casertana
- 1969–70 – Novara, Massese, Casertana
- 1970–71 – Reggiana, Genoa, Sorrento
- 1971–72 – Lecco, Ascoli, Brindisi
- 1972–73 – Parma, SPAL, Avellino
- 1973–74 – Alessandria, Sambenedettese, Pescara
- 1974–75 – Piacenza, Modena, Catania
- 1975–76 – Monza, Rimini, Lecce
- 1976–77 – Cremonese, Pistoiese, Bari
- 1977–78 – Udinese, SPAL, Nocerina
Seasons from 1978–79 to 1990–91
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Seasons from 1991–92 to 2007–08
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Seasons from 2008–09 to 2010–11
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Seasons from 2011–12 to 2013–14 season
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