• Davis, Jefferson - President of the Confederate States of America
  • Dawkins, Richard - British zoologist, author of The Selfish Gene
  • Dayton, Sky - Founder of Earthlink and Boingo Wireless
  • De Havilland, Olivia - British-American actress, winner of two Oscar Best Actress awards
  • Dell, Michael - Founder and chairman of Dell, Inc.
  • Demento, Dr. - Radio DJ, hosts two-hours of "mad music and crazy comedy"
  • DeMille, Nelson - American bestselling mystery writer
  • Deming, W. Edwards - 20th century American statistician
  • De Niro, Robert - American Oscar-winning actor, starred in Raging Bull and Godfather II
  • De Soto, Hernando - Economist, founder of Instituto Libertad y Democracia
  • Devanter, Willis Van - Associate Justice of the U.S. Supreme Court in the early 20th century
  • DiLorenzo, Thomas J. - Professor of economics and author
  • Directors and Producers - Film, TV and stage directors, producers and other crew
  • Dixon, Michael - Management consultant, national chair of the U.S. Libertarian Party (2004- )
  • Doherty, Brian - Senior editor at Reason magazine and reason.com
  • Dooling, Richard - American novelist, co-writer of Stephen King's "Kingdom Hospital" TV miniseries
  • Douglas, Melvyn - American stage and movie actor, winner of Oscar, Tony and Emmy awards
  • Douglass, Frederick - 19th century American abolitionist, known for his autobiography as a slave
  • Downs, Hugh - Past host of the ABC News "20/20" newsmagazine, radio commentator for "Perspectives"
  • Dreyfuss, Richard - American actor, winner of Oscar for The Goodbye Girl
  • Drolet, Leon - State representative in the Michigan House of Representatives
  • Drucker, Peter F. - 20th century Austrian-born American author and professor of management
  • Drudge, Matt - Pioneer of Internet journalism, author of the "Drudge Report" news website
  • Dunaway, Faye - American movie actress, winner of Best Actress Oscar for Network
  • Dyson, Esther - Editor at large at CNET Networks, editor of technology newsletter Release 1.0