John R. Hall may refer to: John Hall (American businessman), chairman and CEO of Ashland Inc. John Roulstone Hall (1826-1911), American architect John Hall (priest) (born 1949), English priest of the Church of England John R. Hall (author) (born 1975), American author and co-founder of Greenwood & Hall John Reeves Hall (died 2005), games programmer at Loki Software and Treyarch John R. Hall (author, blogger, magician) (born 1958), founder of Hunting For Thompson.com and the author of Red, White, and the Blues.