Frank G. Comstock (September 20, 1922 – May 21, 2013) was an American composer, arranger, conductor, and trombonist. For television, Comstock wrote and arranged music for major situation comedies and variety shows; his theme and incidental music for Rocky and His Friends (1959–1964) are probably his best-remembered works. Additionally, his music for Adam-12 earned him a 1971 Emmy nomination.

Comstock's recording credits include eight Hi-Lo's albums and backing arrangements for major recording stars. His 1962 instrumental album, Project: Comstock - Music from Outer Space became a classic and was released on CD in 2004. Recently, Comstock wrote new big-band arrangements for Brian Setzer's Wolfgang's Big Night Out (2007) and Songs from Lonely Avenue (2009) CDs.

He started his arranging career in the dance bands of Sonny Dunham and Benny Carter, and with Les Brown from 1943 to 1955. When dance bands fell out of favor after World War II, Comstock and Doris Day left the Les Brown band. Comstock's backing arrangements for Doris Day's Warner Brothers screen tests impressed studio executives and resulted in a staff arranger position at Warner where he demonstrated his ability to write for large studio orchestras.

He died in 2013.