Ian


 * Ian Miles Cheong, alt-right–adjacent figure who has written for The Post Millennial and Rebel Media
 * Ian R. Crane, conspiracy theorist
 * Ian Fairlie, anti-nuclear activist
 * Ian Juby, young earth creationist
 * Ian Kochinski, aka Vaush, leftist YouTube streamer
 * Ian Paisley, founder of the Democratic Unionist Party
 * Ian Plimer, climate change denialist
 * Ian Smith, prime minister of Rhodesia
 * Ian Stevenson, parapsychologist
 * Ian Stuart Donaldson, neo-Nazi musician