Territory: Southern California
Approximate membership: 2,000

The Mongols don’t have the same nationwide influence as the Outlaws or Hells Angels, but in Southern California they’re as feared as anyone. Thanks to longstanding ties to the region’s street gangs, the Mongols seized control of SoCal from the Hells Angels in the 80s and have yet to relinquish it.

The club’s beef with the Angels dates back decades. In fact, the Mongols were founded by bikers who were denied entry to the Angels because of their race. Today, most members are Hispanic or Native American.