Douglas Clare Fischer (October 22, 1928 – January 26, 2012) was an American keyboardist, composer, arranger, and bandleader. After graduating from Michigan State University (from which, five decades later, he would receive an honorary doctorate), he became the pianist and arranger for the vocal group the Hi-Lo's in the late 1950s.

Fischer went on to work with Donald Byrd and Dizzy Gillespie, and became known for his Latin and bossa nova recordings in the 1960s. He composed the Latin jazz standard "Morning", and the jazz standard "Pensativa". Consistently cited by jazz pianist and composer Herbie Hancock as a major influence ("I wouldn't be me without Clare Fischer"), he was nominated for eleven Grammy Awards during his lifetime, winning for his landmark album, 2+2 (1981), the first of Fischer's records to incorporate the vocal ensemble writing developed during his Hi-Lo's days into his already sizable Latin jazz discography; it was also the first recorded installment in Fischer's three-decade-long collaboration with his son Brent. Fischer was also a posthumous Grammy winner for ¡Ritmo! (2012) and for Music for Strings, Percussion and the Rest (2013).

Beginning in the early 1970s, Fischer embarked on a parallel (and far more lucrative) career, eventually becoming a much sought-after arranger, providing orchestral "sweeteners" for pop and R&B artists such as Rufus (with Chaka Khan), Prince (a regular client from 1984 onwards, and by far Fischer's most frequent in pop music), Robert Palmer, Paul McCartney, Michael Jackson and many others.

Fischer was the third of four children born to Cecil and Louella (Roussin) Fischer of Durand, Michigan, United States. His parents were of German, French, Irish-Scot, and English backgrounds. In grade school he started his general music study with violin and piano as his first instruments. At the age of seven, he began to pick out four-part harmony on the piano. After two years of piano lessons the family moved to Grand Rapids, Michigan, where Fischer began composing classical music and making instrumental arrangements for dance bands.

At South High School he took up cello, clarinet, and saxophone. His high school instructor, Glenn Litton, took an interest in the boy and, because the family could not afford it, gave him free lessons in music theory, harmony, and orchestration. Fischer returned the favor by orchestrating and copying music for him. Whenever the concert band needed an instrument, Fischer would be supplied with it and the fingering chart to play it in concert. This gave him a personal training in orchestration that was invaluable.

Fischer started his own band at 15, for which he wrote all the arrangements. After graduating in 1946, he began undergraduate studies in 1947 at Michigan State University, majoring in music composition and theory, and studying with H. Owen Reed. During his teens there were no funds for him to study piano, so he was mostly self-taught. Therefore his major instrument in college was cello, and piano a minor. Later he changed his major to piano and minor in clarinet.

Fischer's roommates at the Michigan State University were Latin Americans, as were the majority of his friends outside the music department. He was introduced to the music of Tito Puente, Tito Rodriguez, Machito and others. Through his friends he became interested in the Spanish language and took it as a minor on his Master's degree. Fischer's passion for music was always matched by his love of languages.

The average person has about a fifteen percent understanding of a foreign language. He knows what language it is and is familiar with one or two words. With music it is not different. Most people only hear the lyrics to a song or feel the beat. I have always made music for good listeners, with 65 to eighty percent of musical understanding. That is why with my vocal sextet all pieces are sung in the original language, whether that is German, Spanish or Japanese.