The taxon author Williams may refer to:

• Alwyn Williams (1921–2004), British geologist
• Austin Beatty Williams, (1919–1999), carcinologist
• Becky L. Williams, herpetologist
• Benjamin Samuel Williams, (1824–1890, B.S.Williams), botanist
• Bronwyn W. Williams, ostracodologist
• Cameron B. Williams, (C.B. Williams), botanist
• Carroll Milton Williams, (1916–1991, C.M.Williams), entomologist
• Daniel F. Williams, mammalogist
• Dean A. Williams, herpetologist
• Douglas John Williams, entomologist
• Ernest Edward Williams, herpetologist
• Frederic Newton Williams, (1862–1923, F.N.Williams), botanist
• Gary C. Williams, cnidariologist
• Geoff Williams, entomologist
• J.R. Williams, entomologist
• James D. Williams, ichthyologist
• Jason D. Williams, carcinologist
• Jason L. Williams, entomologist
• Jeffrey T. Williams, ichthyologist
• John Beaumont Williams, (1932–2005, J.B.Williams), botanist
• John George Williams, (1913–1997), ornithologist
• Judith L. Williams, carcinologist
• Justin Kirk Williams, botanist
• Kenneth L. Williams, herpetologist
• Kevin Andrew Williams, entomologist
• Kirstin Williams, entomologist
• Llewelyn Williams, (1901–1984, Ll.Williams), botanist
• Louis Otho Williams, (1908–1991, L.O.Williams), botanist
• Mark C. Williams, lepidopterist
• Mark Williams, ostracodologist
• Marvin C. Williams, (M.C.Williams), botanist
• Michael E. Williams, palaeontologist
• Morris D. Williams, U.S. ornithologist
• Paul H. Williams, British entomologist
• R. Anthony D. Williams
• Robert Orchard Williams, (1891–1967, R.O.Williams), botanist
• Robert Statham Williams, (1859–1945, R.S.Williams), botanist
• Roswell Carter Williams, Jr., (1869–1946), entomologist
• Stephen L. Williams, studied Chiroptera
• Suzanne T. Williams, malacologist
• Thomas Albert Williams, (1865–1900, T.A.Williams), botanist