Richard Hartley (born 28 July 1944) is a British composer.

His work is extensive and varied, including musical arrangement for theatre and many scores for television and film. In the 1970s he began a long association with Richard O'Brien. Hartley was originally part of the four-piece band for the Rocky Horror Show. He went on to arrange the score for the London Stage show. He then went on to provide arrangements for the film adaptation, The Rocky Horror Picture Show, and its follow-up Shock Treatment, and worked with O'Brien on another, as yet unproduced, sequel, Revenge of the Old Queen.