Rupert James Kentish (26 June 1914 – 20 December 1978) was an Australian politician. He was a member of the National Party and later the Country Liberal Party. He served as a member of the Northern Territory Legislative Council from 1968 to 1974. He then served in the Northern Territory Legislative Assembly from 1974 to 1977 for Arnhem.
Kentish was born in the Gums, Queensland. He was married to Maluda, an indigenous woman. He died in 1978 or 1979.