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 3 September 2006, to 13 May 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.
| Club | City | Stadium | 2005/2006 Season | |
|---|---|---|---|---|
| A.S. Cittadella | Cittadella | Stadio Pier Cesare Tombolato | 6th in Serie C1/A | |
| U.S. Cremonese | Cremona | |||
| 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 | |
| AS 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 | 5th in Serie C1/B | ||
| U.S. Sassuolo Calcio | Sassuolo | Stadio Enzo Ricci | Serie C2/B Playoff Winners | |
| S.S.C. Venezia | Venice | Stadio Pier Luigi Penzo | Serie C2/A Champions |
| Club | City | Stadium | 2005/2006 Season | |
|---|---|---|---|---|
| A.C. Ancona | Ancona | Stadio del Conero | 5th in Serie C2/A | |
| U.S. Avellino | Avellino | |||
| S.S. Cavese 1919 | Cava de' Tirreni | Stadio Simonetta Lamberti | Serie C2/B Champions | |
| U.S. Foggia | Foggia | Stadio Pino Zaccheria | 13th in Serie C1/B | |
| Gallipoli Calcio | Gallipoli | Stadio Antonio Bianco | Serie C2/C Champions | |
| Giulianova Calcio | Giulianova | Stadio Rubens Fadini | 12th in Serie C1/A | |
| S.S. Juve Stabia | Castellammare di Stabia | Stadio Romeo Menti | 17th in Serie C1/B | |
| S.S. Lanciano | Lanciano | Stadio Guido Biondi | 11th in Serie C1/B | |
| S.S. Manfredonia Calcio | Manfredonia | Stadio Miramare | 10th in Serie C1/B | |
| A.C. Martina | Martina Franca | Stadio Gian Domenico Tursi | 8th in Serie C1/B | |
| Perugia Calcio | Perugia | Stadio Renato Curi | 6th in Serie C1/B | |
| Ravenna Calcio | Ravenna | Stadio Bruno Benelli | 13th in Serie C1/A | |
| Salernitana Calcio 1919 | Salerno | Stadio Arechi | 5th in Serie C1/A | |
| S.S. Sambenedettese Calcio | San Benedetto del Tronto | Stadio Carlo Speroni | 15th in Serie C1/A | |
| San Marino Calcio | Serravalle, San Marino | Stadio Olimpico | 16th in Serie C1/A | |
| Taranto Sport | Taranto | Serie C2/C Playoff Winners | ||
| Teramo Calcio | Teramo | Stadio Comunale | 7th in Serie C1/A | |
| Ternana Calcio | Terni | Stadio Libero Liberati | 20th in Serie B |
Semi-finals
First legs played 27 May 2007; return legs played 3 June 2007
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Final
First leg played 10 June 2007; return leg played 17 June 2007
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Pisa promoted to Serie B
Play-offs
First legs were played 27 May 2007; return were legs played 3 June 2007
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Ivrea and Pizzighettone relegated to Serie C2
Semi-finals
First legs played 27 May 2007; return legs played 3 June 2007
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Final
First leg played 10 June 2007; return leg played 17 June 2007
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Avellino promoted to Serie B
Relegation play-offs
First legs were played 27 May 2007; return legs were played 3 June 2007
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San Marino and Teramo relegated to Serie C2