It was divided into two phases: the regular season, played from September 2008 to May 2009, and the playoff phase from May to June 2009.
It was composed of 54 teams divided into three divisions of 18 teams each, whose teams were divided geographically. Teams only played other teams in their own division, once at home and once away for a total of 34 matches each.
Teams finishing first in the regular season, plus one team winning the playoff round from each division were promoted to Lega Pro Prima Divisione; teams finishing last in the regular season, plus two relegation playoff losers from each division were relegated to Serie D. In all, six teams were promoted to Lega Pro Prima Divisione, and nine teams were relegated to Serie D.
The remaining 39 teams were to come from the group of teams that played in 2007–08 Serie C2 that were neither relegated nor promoted. Of those, Nuorese[2] (9th in Girone A), Sassari Torres[2] (13th in Girone A), Teramo[2] (8th in Girone B), and Castelnuovo[1] (15th in Girone B) were banned or failed to register, creating four more vacancies. A fifth vacancy from this group was created when SPAL, which lost in last year's promotional play-offs, was admitted to Lega Pro Prima Divisione anyway to fill a vacancy.
In all, nine vacancies were created. They were filled as follows:
Considering all changes, the final team list includes only 2 teams that played in Serie C1 last year, 38 teams that played in Serie C2, and 14 teams that played in Serie D.
Promotions
Two of the three division champions were playing in Serie D in 2007–08. Figline and Cosenza won direct promotion to Lega Pro Prima Divisione for the 2009–10 season by winning Girone B and Girone C respectively. The year before they had been division champions in their respective Serie D divisions, and have thus both been promoted twice in consecutive years. Varese won direct promotion by winning Girone A. Varese played in Lega Pro Seconda Divisione/C2 for three years after winning promotion from Serie D in the 2005–06 season.
Relegations
Teams
On August 14, 2008 the following clubs were confirmed to be competing in the division:[4]
Updated to match(es) played on 10 May 2009. Source: Lega Calcio Professionistico Rules for classification: 1) points; 2) goal difference; 3) number of goals scored. (C) Champions; (O) Play-off winners; (P) Promoted; (R) Relegated Notes:
Updated to match(es) played on 17 May 2009. Source: Lega Italiana Calcio Professionistico Rules for classification: 1) points; 2) goal difference; 3) number of goals scored. (C) Champions; (O) Play-off winners; (P) Promoted; (R) Relegated Notes:
Updated to match(es) played on 17 May 2009. Source: Lega Italiana Calcio Professionistico Rules for classification: 1) points; 2) goal difference; 3) number of goals scored. (C) Champions; (O) Play-off winners; (P) Promoted; (R) Relegated Notes: