Keith Martin may refer to:
* Keith Martin (politician) (born 1960), Canadian executive director of the Consortium of Universities for Global Health, former politician
* Keith Martin (ophthalmologist) (born 20th-century), medical researcher specialising in the treatment of glaucoma
* Keith Martin (broadcaster) (1934–2024), British broadcaster and pirate radio DJ
* Keith Martin (musician) (1966–2022), American R&B singer-songwriter and multi-instrumentalist
* Keith Martin (artist) (1911-1983), American abstract and surrealist artist
* Keith Martin (''Time Crisis''), a character in ''Time Crisis II''
* Carl Sargent or Keith Martin (born 1952), British parapsychologist and author of several roleplaying game-based products and novels
* Keith Martin, founder and editor of ''Sports Car Market''
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