Ralph Hubert "Sonny" Barger (born October 8, 1938) is an American outlaw biker, author, and actor who is a founding member (1957) of the Oakland, California chapter of the Hells Angels Motorcycle Club.

Ralph Hubert Barger was born in Modesto, California, on October 8, 1938. His mother abandoned the family when Barger was four months old, leaving him and his older sister Shirley to be raised by their grandmother and alcoholic father. Growing up in Oakland, he was suspended from school several times for assaulting teachers, and he often fought with other boys. He dropped out of school in the tenth grade. 

Barger joined his first motorcycle club, the Oakland Panthers, in 1956. After that club disbanded, he started riding with another group of bikers, one of whom, Don "Boots" Reeves, wore a patch – a small skull wearing an aviator cap set within a set of wings – that belonged to a defunct motorcycle club in North Sacramento

Barger was employed as a machine operator from 1960 to 1965, when he was dismissed due to extended absences. His criminal record began in 1963 after he was arrested for possession of marijuana. He was arrested again on the same charge the following year, and for assault with a deadly weapon in 1965 and 1966

According to former Oakland Hells Angels chapter vice-president George "Baby Huey" Wethern – who later testified against the club and entered the Federal Witness Protection Program – in his 1978 book A Wayward Angel, Barger convened a meeting of the leaders of the Hells Angels and other California motorcycle clubs in 1960 in which the various clubs parleyed over the mutual problem of police harassment.

The clubs voted to ally under a "one percenter" patch to be worn on their respective colors. The term refers to a comment allegedly made by the American Motorcyclist Association (AMA) that 99% of motorcyclists were law-abiding citizens, implying the last one percent were outlaws.

Sonny Barger, the leather-clad fixture of 1960s counterculture and figurehead of the notorious Hells Angels motorcycle club who was at the notorious Rolling Stones concert at Altamont Speedway, has died. He was 83.

Barger's former attorney, Fritz Clapp, told The Associated Press that Barger had liver cancer and died Wednesday night at home in Livermore, California. Barger composed the post placed on the Facebook page managed by Barger's wife, Zorana,

Barger capitalized on his notoriety. He wrote three books about his life and philosophy, including a best-selling autobiography, “Hell’s Angel.” A chapter title in one of his books was “Nothing states your position more clearly than a punch in the face.” He also wrote two novels.

Barger underwent a laryngectomy in the early 1980s for throat cancer, which he attributed to a long, three-pack-a-day cigarette habit. Thereafter, he breathed through a plastic valve in his neck, and covered the vent to speak.