James Lee Jamerson (January 29, 1936 – August 2, 1983) was an American bass player. He was the uncredited bassist on most of the Motown Records hits in the 1960s and early 1970s (Motown did not list session musician credits on their releases until 1971) and he is now regarded as one of the most influential bass players in modern music history. He was inducted into the Rock and Roll Hall of Fame in 2000. As a session musician he stands in second place to English drummer Clem Cattini having played on 30 number one hits to Cattini's 44. Jamerson also played on more than 70 number-one R&B hits.
In 2011, Jamerson ranked third in The "20 Most Underrated Bass Guitarists" in Paste magazine.