[3] In 1914, the marchioness Riso organised a four-team competition that saw the participation of US Catanese, Megara Augusta, Leonzio, and Carlentini.

The old club was reformed by the name of Società Sportiva Leonzio 1909, which enrolled the 1994–95 Campionato Nazionale Dilettanti.

[7] In the summer of 2002, the title of the freshly promoted to Serie D Misterbanco was moved to Lentini under the nomination of Associazione Calcio Lentini,[8] This new team participated in the 2002–03 Serie D, but at the end of the season it was relegated to Eccellenza after losing relegation playoffs to Nuova Vibonese.

As a consequence, Associazione Sportiva Dilettantistica Atletico Leonzio restarted from Terza Categoria, the bottom of the Italian league system.

[20] On July 1, 2013, a new club, named Associazione Sportiva Dilettantistica Sicula Leonzio and formed from the title of Real Belpassese, was admitted to Promozione.

[27][28][29] As a result, the team qualified for the national playoffs for the promotion to Serie D, when they beat San Giorgio 1926 in the semi-final and Real Metapontino in the final.

[30][31] Sicula Leonzio managed to keep a clean sheet for the first six league games of the 2016–17 Serie D (Girone I), receiving attention from the national Italian media as being the only team among the 264 professional football clubs in the first four tiers of Italian football league system having not conceded a goal up to that point.

[33][34] Under the new management, Sicula Leonzio achieved a record 15 winning streak,[35][36][37] and obtained the promotion – the third in a row – to the 2017–18 Serie C with three games to spare.

[38] After the Poule Scudetto, in which Leonzio lost to Monza in the semi-final,[39] Cozza resigned his managerial position to become the manager of Taranto,[40] being replaced by Pino Rigoli.

[41] After a difficult start in season 2017–18, in which Leonzio had won only three out of 16 matches, on December 5, 2017, Rigoli was replaced by Aimo Diana as manager of the club.

[42] With Diana as a manager, Sicula Leonzio achieved a final tenth place, which meant participating in the promotion playoffs that the club, however, lost against Cosenza Calcio.

The 2019–20 season saw Vito Grieco appointed as manager, temporarily replaced by Giovanni Bucaro amid disappointing results.

[50][49] In August 2021, a new club, named Associazione Sportiva Dilettantistica FC Leonzio 1909 and formed from the title of A.S.D.