John Primer is an American Chicago blues and electric blues singer and guitarist.

He played guitar at Theresa's, a club in Chicago, between 1974 and 1980. He was influenced by Muddy Waters' former sideman, Sammy Lawhorn, who taught him to play slide guitar. He joined the Chicago Blues All-Stars of Willie Dixon in 1979, then the Muddy Waters's band until the latter's death in 1983. Then he joined the Teardrops of Magic Slim and began a solo career on Wolf Records. In 1995 he released, The Real Deal, with songwriting and singing techniques showing the influence of both Dixon and Slim.