Mark Snow (born August 26, 1946) is an American composer for film and television, best known for his work with The X-Files.Born Martin Fulterman in New York City, New York on August 26, 1946, Snow grew up in the borough of Brooklyn, graduating from the High School of Music and Art (1964) and, afterwards, the Juilliard School of Music.

He was a co-founder of the New York Rock & Roll Ensemble.Snow also composed the score for the television movie Dirty Pictures, the series Smallville and One Tree Hill. He has also composed music for video games, such as Syphon Filter: Dark Mirror and Urban Assault (cutscene music only).

Snow has been nominated for 19 Emmy Awards and won 34 ASCAP awards. He was nominated for a César Award for his work on the film Coeurs directed by French director, Alain Resnais. Snow has also worked on Resnais's film Les Herbes folles.

His scores for 2013 include the final episodes of season three of Blue Bloods. There are no further known projects.Snow stopped composing for Smallville; his final season was season seven, at which point from season eight onward Louis Febre—who had composed additional score on some of Snow's episodes previously—took over as composer.