Cagliari Calcio, commonly referred to as Cagliari, is an Italian football club based in Cagliari, Sardinia. In the 2022-23 season, The club competes in the Serie B. As of 2021–22, the team is temporarily playing their home games at the 16,416-seat Unipol Domus, adjacent to their future new stadium site. Founded in 1920, they won their only Scudetto in 1969–70, when they were led by the Italian national team's all-time leading scorer, Gigi Riva. The triumph was also the first by a club from south of Rome. The club's best European performance was in the 1993–94 UEFA Cup, losing in the semi-finals to Internazionale. As with the flag of its city, Cagliari's colours are blue and red. The club badge incorporates the flag of Sardinia.

The Unipol Domus is a football stadium in Cagliari, Sardinia, Italy. Built in 2017 as Sardegna Arena, it hosts Cagliari Calcio football matches from 2017–18, since Stadio Sant'Elia was closed and partially demolished in order to build a new stadium. It was used as a provisional stadium until 2021 when the construction was fully completed and name changed to Unipol Domus.