Legea voetbal polo U.S. Avellino

Unione Sportiva Avellino 1912, commonly known as US Avellino, is an Italian professional football club based in Avellino, Campania. It competes in Serie C, the third tier of Italian football.

It is the official continuity club of US Avellino 1912, known worldwide for having competed in Serie A for ten consecutive seasons, from 1978-1979 to 1987-1988. 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.