The taxon authority Baker may refer to:

• Allan J. Baker, Canadian ornithologist
• Alan N. Baker, marine mammals
• Anne S. Baker, British acarologist
• Arthur Challen Baker (1875–1959), U.S. entomologist and botanist
• Austin Baker - entomologist
• C. Scott Baker, marine mammals
• Charles Fuller Baker (1872–1927), U.S. entomologist (Hemiptera) and botanist
• David Michael Baker - malacologist
• Donald Burton Baker (1922–2004), entomologist
• Ed Baker, British entomologist
• Edmund Gilbert Baker (1864–1949), botanist, cited Baker f. in botanical references
• Edward Charles Stuart Baker (1864–1944), British ornithologist
• Edward W. Baker, entomologist and acarologist
• Frank Collins Baker, malacologist, zoologist and paleontologist
• Frederick Harry Uther Baker, Australian entomologist (Coleoptera)
• George Thomas Bethune-Baker, entomologist (Lepidoptera)
• Gladys Elizabeth Baker (born 1908), U.S. lichenologist and mycologist, cited G.E.Baker in botanical references
• Herbert George Baker (1920–2001), botanist, cited H.G.Baker in botanical references
• Horace Burrington Baker (1889–1971), U.S. malacologist
• John Gilbert Baker (1834–1920), British botanist, cited Baker in botanical references
• John R. Baker Emeritus Reader in Cytology at Oxford University.
• Jon Baker, entomologist (Lepidoptera)
• Michael R. Baker (fl. 1983), parasitologist
• Milo Samuel Baker (1868–1961), botanist
• Mohammad Adnan Abu Baker, Jordanian mammalogist
• Richard Thomas Baker (1854–1941), Australian botanist
• Robert James Baker (1942–2018), U.S. chiropterist
• Rollin H. Baker (1916–2007), mammalogist
• Sarah Martha Baker (1887–1917; S.M.Baker), English botanist