Charles Walter Rainey III (born June 17, 1940 in Cleveland, Ohio, United States) is an American bass guitarist who has performed and recorded with many well-known acts, including Aretha Franklin, Steely Dan, and Quincy Jones.

Rainey’s youthful pursuits included violin, piano and trumpet. Later, while attending Lane College in Tennessee, Rainey switched to baritone horn to join the school’s travelling brass ensemble. While on active military duty, Rainey learned rhythm guitar and began playing professionally with local bands. His lack of improvisational skills on guitar led him to pick up the bass, and soon Rainey found himself working steadily as a studio bassist in New York City, recording or touring with many of the greatest acts of that time.

By the 1970s he had played with Jerome Richardson, Grady Tate, Mose Allison, Gato Barbieri, and Gene Ammons, as well as with Eddie Vinson at the 1971 Montreux Festival.

As a member of The King Curtis All-Stars, he toured with the Beatles on their second run across the United States. By the beginning of the 1970s, Rainey had firmly established his place as one of New York City’s first call session bass guitarists.^{[citation needed]}

In 1972, he released his first solo album The Chuck Rainey Coalition on Skye Records. The coalition consists of notable session musicians Richard Tee, Warren Smith, Specs Powell, Eric Gale, Bernard Purdie, Herb Lovelle, Cornell Dupree and Billy Butler.