The Hells Angels Motorcycle Club was founded in 1948 in California, USA. The first chapter of the club was started by a group of motorcyclists led by Ralph "Sonny" Barger, who played a significant role in establishing the organization. The specific date of the club's formation is disputed, as there are varying accounts regarding the exact timeline. However, it is generally recognized that the Hells Angels Motorcycle Club originated in the late 1940s.