Rhythm King started out as an offshoot of Daniel Miller's Mute Records. Started in 1986 by James Horrocks and Martin Heath, Rhythm King's initial focus was dance music, specifically House Music, Acid House and Acid Jazz. James Horrocks left the label at the end of 1987 and subsequently went on to form React Music Ltd in 1990 which also had a focus upon dance music. This left Martin Heath in sole charge of the label. By the beginning of 1988 Rhythm King was to enjoy a period of short term success which went hand in hand with the dominance dance music had in the UK singles chart from the late 1980s to the beginning of the 2000s.

Employees included Adele Nozedar.

Label code: LC 7962