Bob Magnusson (born February 24, 1947 in New York, U.S.A.) is a bassist best known for his jazz and studio work. He has worked with scores of well-known names in modern jazz. His discography includes over 150 albums.
Magnusson studied French horn for 12 years before switching to bass in 1967. He toured with Buddy Rich's Orchestra in 1968 and played with the San Diego Symphony and Sarah Vaughan (1971–72 and 1975–76). A studio musician for decades, he was part of the co-op group Road Work Ahead from 1979 to 1982, and worked with John Klemmer, Art Pepper, Benny Golson, Joe Farrell, Linda Ronstadt (with Nelson Riddle's Orchestra), Bud Shank, Laurindo Almeida, Shorty Rogers, Bob Cooper, Lou Donaldson, Clifford Jordan, George Cables, Victor Lewis, Joe Pass, Art Farmer, Kenny Barron, Freddie Hubbard, Slide Hampton, Billy Higgins, Carl Fontana, Tommy Flanagan, Mike Wofford, Holly Hofmann, Kenny Burrell, Roger Kellaway, Randy Porter, Ernie Watts, Eddie "Cleanhead" Vinson, Peter Erskine, Bobby Shew, Bill Mays, Natalie Cole, Neil Diamond, Bonnie Raitt, 10,000 Maniacs, Madonna, Hank Jones, Cedar Walton, Jimmy Heath and others. Including the Road Work Ahead projects, Magnusson led record dates for Discovery Records in 1979, 1980 and 1984, and Trend Records in 1982.