Associazione Sportiva Dilettantistica Cynthia 1920 was an Italian association football club located in Genzano di Roma, Lazio.

In the season 2006–07 it was promoted in Serie D for the first time.

In the season 2011–12 it was relegated to Eccellenza, but the club will continue to play in Serie D after being readmitted to fill the vacancies created.

[1] In June 2020, Cynthia merged with neighbouring Albano Laziale-based club Albalonga to form Cynthialbalonga.

This article about an Italian football club is a stub.