This article is about the fans of Italian football club S.S. Lazio.

The history of organized fan groups of S.S. Lazio, known in Italian as the Tifoseria Laziale began in the late 1960s, in which small groups of supporters filled the steps of Stadio Olimpico in Rome. They belonged to different groups: Tuparamos, Eagles, Ultras, Vigilantes, NAB, CAST and Marines, the latter consisting mostly of younger fans.

The early groups were not united and so in 1971, the first major ultras group was formed: Commandos Monteverde Lazio, also known as C.M.L. '74. In 1976, the G.A.B.A. (Gruppi Associati Bianco Azzurri) was formed. They renamed themselves the Eagles Supporters the following year. The name was of British influence^{[clarification needed]} and for over a decade, the Eagles Supporters led the Lazio terrace, Curva Nord.

In 1978, a group called VIKING Lazio was formed, and took their place in the Curva Sud. In this same year, the Eagles Supporters, who originally began in the south stands, made their way to Curva Nord, which became the main Lazio terrace. Other small groups followed the Eagles besides Viking.

Società Sportiva Lazio, (BIT: SSL) commonly referred to as Lazio, is a professional Italian football club based in Rome. The team, founded in 1900, play in the Serie A and have spent most of their history in the top tier of Italian football. Lazio have been Italian champions twice, and have won the Coppa Italia five times, the Supercoppa Italiana three times, and both the UEFA Cup Winners' Cup and UEFA Super Cup on one occasion.

The club had their first major success in 1958, winning the domestic cup. In 1974 they won their first Serie A title. The past fifteen years have been the most successful period in Lazio’s history, seeing them win the UEFA Cup Winners' Cup and UEFA Super Cup in 1999, the Serie A title in 2000, several domestic cups and reaching their first UEFA Cup final in 1998.

Lazio's traditional kit colours are sky blue shirts and shorts with white socks. Their home is the 72,689 capacity Stadio Olimpico in Rome, which they share with A.S. Roma. Lazio have a long-standing rivalry with Roma, with whom they have contested the Derby della Capitale (in English "Derby of the capital" or Rome derby) since 1929.

Lazio (pronounced [ˈlattsjo], Latin: Latium) is one of the 20 administrative regions of Italy, situated in the central peninsular section of the country. With about 5.7 million residents and a GDP of more than 170 billion euros, Lazio is the third most populated and the second richest region of Italy. It includes Rome, capital and largest city of Italy.

Lazio comprises a land area of 17,236 km² (6,655 sq mi) and it has borders with Tuscany, Umbria, and Marche to the north, Abruzzo and Molise to the east, Campania to the south, and the Tyrrhenian Sea to the west. The region is mainly flat and hilly, with small mountainous areas in the most eastern and southern districts.

The coast of Lazio is mainly composed of sandy beaches, punctuated by the headlands of Circeo (541 m) and Gaeta (171 m). The Pontine Islands, which are part of Lazio, lie opposite the southern coast. Behind the coastal strip, to the north, lies the Maremma Laziale (the continuation of Tuscan Maremma), a costal plain interrupted at Civitavecchia by the Tolfa Mountains (616 m). The central section of the region is occupied by the Roman Campagna, a vast alluvial plain surrounding the city of Rome, with an area of approximately 2,100 km² (811 sq mi). The southern districts are characterized by the flatlands of Agro Pontino, a once swampy and malarial area, that was reclaimed over the centuries.