[7] Until 1910, the club played at an amateur level until it officially joined the league competition in 1912 as soon as the Italian Football Federation began organising championships in the center and south of Italy, and reached the final of the national championship playoff three times, but never won, losing in 1913 to Pro Vercelli, in 1914 to Casale and in 1923 to Genoa 1893.

In 1927, Lazio was the only major Roman club which resisted the Fascist regime's attempts to merge all the city's teams into what would become Roma the same year.

The club played in the first organised Serie A in 1929 and, led by legendary Italian striker Silvio Piola,[8] achieved a second-place finish in 1937 – its highest pre-war result.

[9] Back to Serie A in 1972–73, Lazio immediately emerged as surprise challengers for the Scudetto to Milan and Juventus in 1972–73, only losing out on the final day of the season, with a team comprising captain Giuseppe Wilson, as well as midfielders Luciano Re Cecconi and Mario Frustalupi, striker Giorgio Chinaglia, and head coach Tommaso Maestrelli.

[14] Lazio were forcibly relegated to Serie B in 1980, due to a remarkable scandal concerning illegal bets on their own matches, along with Milan.

In 1986, Lazio was hit with a nine-point deduction (a true back in the day of the two-point win) for a betting scandal involving player Claudio Vinazzani.

[15][16] The arrival of Sergio Cragnotti in 1992 changed the club's history, due to his long-term investments in new players to make the team a Scudetto competitor.

A notable early transfer during his tenure was the capture of English midfielder Paul Gascoigne from Tottenham Hotspur for £5.5 million.

[17] Lazio were Serie A runners-up in 1995, third in 1996 and fourth in 1997, then losing the championship just by one point to Milan on the last championship's match in 1999 before, with the likes of Siniša Mihajlović, Alessandro Nesta, Marcelo Salas and Pavel Nedvěd in the side, winning its second Scudetto in 2000, as well as the Coppa Italia double with Sven-Göran Eriksson (1997–2001) as manager.

[19] In addition, Lazio won the Supercoppa Italiana twice and defeated Manchester United in 1999 to win the UEFA Super Cup.

[23] In the 2006–07 season, despite a later-reduced points deduction, Lazio achieved a third-place finish, thus gaining qualification to the UEFA Champions League third qualifying round, where they defeated Dinamo București to reach the group phase, and ended fourth place in the group composed of Real Madrid, Werder Bremen and Olympiacos.

[24] Lazio started the 2009–10 season playing the Supercoppa Italiana against Inter in Beijing and winning the match 2–1, with goals from Matuzalém and Tommaso Rocchi.

[27] Lazio's colours of white and sky blue were inspired by the national emblem of Greece, due to the fact that Lazio is a mixed sports club this was chosen in recognition of the fact that the Ancient Olympic Games and along with it the sporting tradition in Europe is linked to Greece.

[28] Originally, Lazio wore a shirt which was divided into white and sky blue quarters, with black shorts and socks.

[30] Lazio's traditional club badge and symbol is the eagle, which was chosen by founding member Luigi Bigiarelli.

[31] A symbol of the Roman legions and emperor, it was chosen to represent power and victory; it also identifies the club with its origin city.

[1] Also on the Foro Italico lies the Stadio dei Marmi, or "marble stadium", which was built in 1932 and designed by Enrico Del Debbio.

[40][41] A minority of Lazio's ultras used to use swastikas and fascist symbols on their banners, and they have displayed racist behaviour in several occasions during the derbies.

Most notably, at a derby of the season 1998–99, laziali unfurled a 50-metre banner around the Curva Nord that read, "Auschwitz is your town, the ovens are your houses".

[54] Piola, who played also with Pro Vercelli, Torino, Juventus and Novara, is also the highest goalscorer in Serie A history, with 274 goals.

[59] Claudio Lotito, the current chairman of Lazio, purchased the club from Cragnotti in 2004, but owned just 26.969% of shares as the largest shareholders at that time.

Unlike Internazionale, Roma and Milan, who were sanctioned by UEFA due to breaches of Financial Fair Play, Lazio passed the regulations held by the administrative body with the high achievements.

Lotito also received a prize that joint awarded by Associazione Italiana Allenatori Calcio and DGS Sport&Cultura, due to Lazio's financial health.

[68] Mizuno would become the team's new sportswear and technical gear provider, with the Biancocelesti receiving €20 million over the next five years as a result of their new agreement with the Japanese company.