A Monegasque association founded in 1952 to support AS Monaco, the "CSM" serves as the official club for the "Rouge et Blanc" supporters. It allows members to reserve seats, benefit from preferential rates, receive a warm welcome upon arrival in Monaco, and enjoy streamlined access to matches played at the Stade Louis-II; it also organizes away trips so members can travel to cheer on the team throughout France and Europe.

The CSM also maintains close ties with the Ultras, as well as other supporter groups it interacts with at the Stade Louis-II, collaborating with them to organize matchday entertainment and activities.

Notably, in November 2022, the Supporters' Club celebrated its 70th anniversary—marking seven decades of unwavering loyalty to the institution. It is also worth mentioning that, each season, the Club selects AS Monaco’s Player of the Season through a vote conducted among its members.