The taxon authority Dunn may refer to:

  • Alison M. Dunn (fl. 2004; A.M.Dunn), mycologist
  • C.W. Dunn, U.S. cnidariologist
  • David Baxter Dunn (1917-1994; D.B.Dunn), botanist
  • Edward John Dunn (1844–1937; E.J.Dunn), geologist, botanist
  • Emmett Reid Dunn (1894–1956), U.S. herpetologist active in the Americas
  • Robert R. Dunn, U.S. biologist, professor in the Department of Biological Sciences at North Carolina State University. Often published as Rob R. Dunn
  • Stephen Troyte Dunn (1868–1938, Dunn), English botanist who made significant contributions to the taxonomy of Chinese plants