Hugh McDowell (31 July 1953, Hampstead, London) is an English cellist best known for his membership in Electric Light Orchestra (ELO) and related acts.
McDowell performed with the first live line-up of ELO in 1972 while only 19 years old, but left with founding member Roy Wood and horn player/keyboardist Bill Hunt to perform with the group Wizzard. During his time in Wizzard, he played both cello and Moog synthesizer, but returned to ELO in 1973 to replace Colin Walker. His return was partly motivated by a desire to play more cello and less keyboards as he had done with Wizzard. McDowell remained with the group until Jeff Lynne removed the string players from the line-up. In 1991 he performed with Electric Light Orchestra Part II.
He is involved with computer programming and in 1992 published a music composition program called "Fractal Music Composer." He developed a suite of four programs: Mandelbrot Set Composer, Julia Set Composer, Mandelbrot Zoom and Play Midi.