Società Sportiva Calcio Napoli, commonly referred to as Napoli ([ˈnaːpoli]), is an Italian professional football club based in the city of Naples (Italian: Napoli), Campania that plays in Serie A, the top flight of Italian football. Napoli has won two Serie A titles, six Coppa Italia titles, two Supercoppa Italiana titles, and one UEFA Cup.

The club was formed in 1926 as Associazione Calcio Napoli following the merger of U.S. Internazionale Napoli and Naples Foot-Ball Club. Napoli saw relatively little success in its early years, winning their first major trophy in the 1962 Coppa Italia. Napoli then saw increased success in the late 1970s (including their second Coppa Italia in 1976) and especially in the 1980s, after the club acquired Diego Maradona in 1984. During his time in Naples, Maradona helped the team win several trophies, which led to the club retiring his number 10 jersey. During this period, Napoli won their sole league titles, in 1987 and 1990, the 1987 Coppa Italia, and their only European trophy with the 1989 UEFA Cup. Following his departure, however, Napoli struggled financially, and endured several relegations and a bankruptcy, prior to being re-founded in 2004 by film producer Aurelio De Laurentiis. Under his leadership, the club has stabilized, which has led to renewed on-field success, winning the 2012, 2014, and 2020 Coppa Italia titles.

By attendance, Napoli have the fourth largest fan base in Italy, and were ranked as the fifth highest-earning football club in Serie A, with $182 million in revenue during the 2017–18 season. In 2018, Forbes estimated the club is the fifth most valuable club in Italy, worth $379 million. Napoli are also one of the associate members of the European Club Association.