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- R. A. K. Mason, New Zealand poet
- Raymond Mason (disambiguation), several people
- Richard Mason (disambiguation), several people including:
- Richard Mason (1919–1997), the author of The World of Suzie Wong
- Richard Mason (born 1977), born in South Africa, the author of The Drowning People
- Richard Mason, American physician and political organiser
- Richard Barnes Mason (1797–1850), military governor of California
- Robert Mason, veteran of the Vietnam War and writer.
- Roger Mason, Jr., American basketball player
- Ron Mason, Canadian ice hockey coach
- Ron G. Mason, Oceanographer
- Roswell B. Mason (1805–1892), mayor of Chicago
- Roy Mason (born 1924), British politician
- Roy Mason (1938–1996), American architect
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