The primary supporters groups for St. Louis CITY SC include St. Louligans. These independent fan organizations are the heartbeat of the matchday atmosphere, leading chants, displaying tifos, and creating the wall of sound that makes MLS stadiums come alive.
MLS supporters groups operate independently from the clubs, organizing their own events, travel to away matches, and community initiatives. They play a crucial role in building soccer culture in their cities. St. Louis CITY SC's supporters are known for their passionate displays at CITYPARK, creating an intimidating atmosphere for visiting teams.