 Poggibonsi played in the Serie D from 2004 to 2006, when the club, which ended the 2005–06 Serie D season in third place, was promoted because league winners Fortis Spoleto and second-placed Fortis Juventus were unable to play in the Serie C2 league.The club ended its 2006–07 Serie C2 campaign in thirteenth place, one point above the relegation playoff spots, and therefore remained in the Lega Pro Seconda Divisione (the rebranded Serie C2) in the 2007–08 season.Poggibonsi were relegated back to Serie D on 2013–14, after completing their season in 16th place.