Johnston
The taxon authority Johnston may refer to:
- Barry C. Johnston (B.C.Johnst.), botanist
- George Johnston (1797–1855), Scottish naturalist
- Gregory Ronald Johnston, Australian zoologist
- Gweneth & Bernard Johnston, Hong Kong entomologist duo
- Harry Hamilton Johnston (1858–1927, H.H.Johnst.), British explorer and botanist
- Henry Bennett Johnston (1886–1974), entomologist
- Henry Halcro Johnston (1856-1939, Henry H.Johnst.), Scottish botanist
- Horace Greeley Johnston (1902–1984), U.S. entomologist
- Ivan Murray Johnston (1898–1960, I.M.Johnst.), botanist
- John E. Johnston, entomologist
- John Robert Johnston (1880–1953, J.R.Johnst.), botanist
- Jen Johnston (born 1954, J.Johnst.), Australian lichenologist
- Laverne Albert Johnston (born 1930, L.A.Johnst.), botanist
- Marshall Conring Johnston (born1930, M.C.Johnst.), botanist
- Murray Andrew Johnston, U.S. entomologist (coleopterist)
- Nikolas P. Johnston, entomologist
- Paul A. Johnston, Canadian palaeontologist
- Peter R. Johnston (born 1952, P.R.Johnst.), mycologist
- Robert Mackenzie Johnston (1843–1918, R.M.Johnst.), Scottish-Australian zoologist, botanist, paleontologist and geologist
- Stephen Jason Johnston (1873–1925), Australian zoologist and parasitologist
- Thomas Harvey Johnston (1881–1951), parasitologist