Supporters and rivalries

Lazio is the sixth most supported football club in Italy with around 3.5% of Italian football fans supporting the club (according to the Doxa Institute-L'Expresso’s research of April 2006). Historically the largest section of Lazio supporters in the city of Rome has come from the northern section just above the Vatican City, creating an arch like shape across Rome with areas such as; Parioli, Prati, Flaminio, Salario, Nomentano, Cassia and Monte Mario.

Founded in 1987 Irriducibili Lazio are currently the club's biggest ultras group. The group has become notorious for their far-right political stance, which has received worldwide media attention. However, as with all clubs the political stance of the ultras does not represent the entire fanbase. In terms of match day displays Lazio ultras opt for a traditionally English style and embrace elements of lad culture. Usually the only time they create traditional Italian ultras displays is for the Derby della Capitale.

The Derby della Capitale, known in English speaking countries as the Rome derby is a match between Lazio and their main rivals Roma; it is amongst the most heated and emotional footballing rivalries in the world. A Lazio fan, Vincenzo Paparelli was killed at one of the derby games during the 1979–80 season after being hit in the eye by a flare thrown by a Roma fan. Lazio also have a strong rivalry with Napoli, while conversely the ultras have friendly relationships with Inter and Hellas Verona.