The primary supporters groups for Philadelphia Union include Sons of Ben. 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. Philadelphia Union's supporters are known for their passionate displays at Subaru Park, creating an intimidating atmosphere for visiting teams.