Lee Mack Ritenour (/ˈrɪtnər/ RIT-nər; born January 11, 1952) is an American jazz guitarist who has been active since the late 1960s.

Ritenour was born on January 11, 1952 in Los Angeles, California, United States. At the age of eight he started playing guitar and four years later decided on a career in music. When he was 16 he played on his first recording session with the Mamas & the Papas. He developed a love for jazz and was influenced by guitarist Wes Montgomery. At the age of 17 he worked with Lena Horne and Tony Bennett. He studied classical guitar at the University of Southern California.

Ritenour’s solo career began with the album First Course (1976), a good example of the jazz-funk sound of the 1970s, followed by Captain Fingers, The Captain’s Journey (1978), and Feel the Night (1979).