2006–07 Serie C1
The 2006–07 Serie C1 was the twenty-ninth edition of Serie C1, the third highest league in the Italian football league system. It was divided into two phases: the regular season, played from September 3, 2006, to May 13, 2007, and the playoff phase. Once the regular season was over teams placed 2nd to 5th entered a playoff to determine the second team in each division to be promoted to Serie B. At the same time, teams placed 14th to 17th entered a playout for the right to remain in Serie C1 the following season.
As usual, Serie C1 was composed by two divisions, whose teams were divided geographically. Division C1/A was mainly composed by Northern Italy teams, whereas Division C1/B included mostly Central and Southern Italy teams. No teams from the major islands of Sardinia or Sicily took part in the 2006–07 Serie C1, as the only two eligible to participate in it, Gela and Sassari Torres, were both omitted due to financial troubles.
Teams finishing first in the regular season, plus one team winning the playoff round from each division were promoted to Serie B; teams finishing last in the regular season, plus two relegation playoff losers from each division were relegated to Serie C2. In all, four teams were promoted to Serie B, and six teams were relegated to Serie C2.
Clubs
Serie C1/A
| Club | City | Stadium | 2005/2006 Season |
| A.S. Cittadella | Cittadella | Stadio Pier Cesare Tombolato | 6th in Serie C1/A |
| U.S. Cremonese | Cremona | Stadio Giovanni Zini | 21st in Serie B |
| U.S. Grosseto F.C. | Grosseto | Stadio Carlo Zecchini | 3rd in Serie C1/B |
| U.S. Ivrea Calcio | Ivrea | Stadio Gino Pistoni | Serie C2/A Playoff Winners |
| A.S. Lucchese-Libertas | Lucca | Stadio Porta Elisa | 7th in Serie C1/B |
| U.S. Massese 1919 | Massa | Stadio Dino Manuzzi | 16th in Serie C1/B |
| A.C. Monza Brianza 1912 | Monza | Stadio Brianteo | 3rd in Serie C1/A |
| Novara Calcio | Novara | Stadio Silvio Piola | 8th in Serie C1/A |
| Calcio Padova | Padova | Stadio Euganeo | 9th in Serie C1/A |
| A.C. Pavia | Pavia | Stadio Pietro Fortunati | 4th in Serie C1/A |
| Pisa Calcio | Pisa | Arena Garibaldi - Romeo Anconetani | 15th in Serie C1/B |
| A.C. Pistoiese | Pistoia | Stadio Marcello Melani | 9th in Serie C1/B |
| A.S. Pizzighettone | Pizzighettone | Stadio Comunale | 11th in Serie C1/A |
| Pro Patria | Busto Arsizio | Stadio Carlo Speroni | 10th in Serie C1/A |
| A.C. Pro Sesto | Sesto San Giovanni | Stadio Breda | 14th in Serie C1/A |
| A.C. Sangiovannese 1927 | San Giovanni Valdarno | Stadio Virgilio Fedini | 5th in Serie C1/B |
| U.S. Sassuolo Calcio | Sassuolo | Stadio Enzo Ricci | Serie C2/B Playoff Winners |
| S.S.C. Venezia | Venice | Stadio Pierluigi Penzo | Serie C2/A Champions |