Robert David "Dave" Grusin (born June 26, 1934) is an American composer, arranger, producer, and pianist. He has composed many scores for feature films and television, and has won numerous awards for his soundtrack and record work, including an Academy Award and ten Grammy Awards. He has had a prolific recording career as an artist, arranger, producer and executive producer. He is the co-founder of GRP Records.

Born in Littleton, Colorado, he studied music at the University of Colorado at Boulder and was awarded his degree in 1956. He produced his first single, "Subways Are for Sleeping", in 1962 and his first film score for Divorce American Style (1967). Other scores followed, including Winning (1969), The Friends of Eddie Coyle (1973), The Midnight Man (1974), and Three Days of the Condor (1975).

In the late 1970s, he started GRP Records with his business partner, Larry Rosen, and began to create some of the first commercial digital recordings. He was the composer for The Graduate, On Golden Pond (1981), Tootsie (1982) and The Goonies (1985). In 1988, he won the Oscar for best original score for The Milagro Beanfield War.

From 2000 through 2011, Grusin concentrated on composing classical and jazz compositions, touring and recording with collaborators, including guitarist Lee Ritenour. Their album Harlequin won a Grammy Award in 1985. Their classical crossover albums, Two Worlds and Amparo, were nominated for Grammys.