Sir John McClelland (1805–1875, also spelled John M'Clelland) was a British medical doctor and naturalist with interests in geology and biology, who worked for the East India Company.
In 1835 he was sent on a mission (Tea Committee) to identify if tea could be grown in north-eastern India along with Nathaniel Wallich and William Griffith. He was also involved in surveys of forests and his reports led to the establishment of the Forest Department in India. McClelland served as an interim superintendent of the Acharya Jagadish Chandra Bose Botanical Garden ("Calcutta Botanical Garden") from 1846 to 1847 and was editor of the Calcutta Journal of Natural History from 1841–1847.
- McClelland, J., 1838: Observations on six new species of Cyprinidae, with an outline of a new classification of the family. Journal of the Asiatic Society of Bengal 7: 941–948, Pls. 55-56. BHL Reference page.
- McClelland, J. 1839. Indian Cyprinidae, Asiatic Researches, 19: 217–471
- McClelland, J., 1842: On the fresh-water fishes collected by William Griffith, Esq., F. L. S. Madras Medical Service, during his travels under the orders of the Supreme Government of India, from 1835 to 1842. Calcutta Journal of Natural History 2 (8): 560–589, Pls. 6, 15, 18, 21. Reference page.
- 11 taxon names authored by John McClelland (List may be incomplete)
- Dey, Subhas C (1984) Ichthyological developments in Assam during Nineteenth Century. Indian Journal of History of Science, 19 (4): 297–313 PDF
- Desmond, Ray 1994. The European Discovery of the Indian Flora. Oxford University Press.