The primary supporters groups for Seattle Sounders FC include Emerald City Supporters and Gorilla FC. 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. Seattle Sounders's supporters are known for their passionate displays at Lumen Field, creating an intimidating atmosphere for visiting teams.