The club was founded as U.S. Avellino on 12 December 1912 to give the town of Avellino a footballing representative. The team went through two major reboots: once, in 2009, when it went bankrupt, and then, in 2018, when it was excluded from Serie B. In both cases, new clubs were founded to join the Serie D league. The club was renamed as Avellino Calcio.12 Società Sportiva Dilettantistica in 2009, then Associazione Sportiva Avellino 1912 in 2010, and restored to the original Unione Sportiva Avellino 1912 in 2015, although initially taking the name Calcio Avellino Società Sportiva Dilettantistica for the 2018-2019 season. Main rivals are Benevento Calcio and US Salernitana. Its traditional colours are green and white. Avellino are nicknamed the “Lupi”, which means wolf, and their club crest displays a wolf head.