C
- Jean Cabanis (1816–1906), German ornithologist
- George Caley (1770–1829), English botanist
- Rudolf Jakob Camerarius (1665–1721), German botanist
- Frederick Campion Steward (1904–1993), British botanist
- A. P. de Candolle (1778–1841), Swiss botanist
- Philip Pearsall Carpenter (1819–1877), conchologist
- Alexis Carrel (1873–1944), French biologist and surgeon, winner of the 1912 Nobel Prize in Physiology or Medicine for his work on sutures and organ transplants, advocate of eugenics
- Elie-Abel Carrière (1818–1896), French botanist
- Clodoveo Carrión Mora (1883–1957), Ecuadorian paleontologist and naturalist
- Sean B. Carroll, American evolutionary development biologist
- Rachel Carson (1907–1964), biologist, author of Silent Spring
- George Washington Carver (1860–1943), American botanist
- John Cassin (1813–1869), American ornithologist
- Alexandre de Cassini (1781–1832), French botanist (abbr. in botany: Cass.)
- William E. Castle (1867–1962), American geneticist
- Mark Catesby (1683–1749), English naturalist
- Andrea Cesalpino (1519–1603), Italian botanist
- Francesco Cetti (1726–1778), Italian zoologist
- Carlos Chagas (1879–1934), Brazilian physician
- Adelbert von Chamisso (1781–1838), German botanist
- Min Chueh Chang (1908–1991), biologist
- Frank Michler Chapman (1864–1945), ornithologist
- Martha Chase (1927–2003), American biologist, conducted the Hershey-Chase experiment which linked DNA to heredity
- Thomas Frederic Cheeseman (1846–1923), New Zealand botanist and naturalist.
- Sergei Chetverikov (1880–1959), Russian population geneticist
- Charles Chilton (1860–1929), New Zealand zoologist
- Carl Chun (1852–1914), German marine biologist
- Nathan Cobb (1859–1932), American biologist, considered the founder of the discipline of nematology
- Alfred Cogniaux (1841–1916), Belgian botanist (abbr. in botany: Cogn.)
- Stanley Cohen (born 1922), American biologist who won the Nobel Prize Laureate in Physiology and Medicine (1986) for his discovery of growth factors.
- James J. Collins, American biologist, synthetic biology and systems biology pioneer
- Henry Boardman Conover (1892–1950), American ornithologist
- Timothy Abbott Conrad (1803–1877), American malacologist
- James Graham Cooper (1830–1902), American naturalist
- William Cooper (1798–1864), American conchologist
- Edward Drinker Cope (1840–1897), fish, reptiles, paleontology
- Charles Coquerel (1822–1867), French navy surgeon and entomologist
- Carl Ferdinand Cori (1896–1984), American biochemist, winner of the 1947 Nobel Prize in Physiology or Medicine for his work on the Cori cycle
- Gerty Cori (1886–1957), American biochemist, first American woman to win a Nobel Prize in science, the prize was awarded to her and her husband Carl for their work on the Cori cycle
- Charles B. Cory (1857–1921), American ornithologist
- Emanuel Mendez da Costa (1717–1791), English botanist, naturalist, philosopher
- Elliott Coues (1842–1899), American ornithologist
- Marjorie Courtenay-Latimer (1907–2004), South African zoologist
- Jacques Cousteau (1910–1997), French marine biologist and explorer
- Miguel Rolando Covian (1913–1992), Argentine-Brazilian neurophysiologist, father of Brazilian neurophysiology
- Frederick Vernon Coville (1867–1937), American botanist
- Robert K. Crane, (born 1919), American biochemist, discovered sodium-glucose cotransport.
- Philipp Jakob Cretzschmar (1786–1845), German zoologist
- Francis Crick (1916–2004), one of the discoverers of the structure of the DNA molecule and a neurobiologist
- Joseph Charles Hippolyte Crosse (1826–1898), French conchologist
- Nicholas Culpeper (1616–1654), English botanist
- Allan Cunningham (1791–1839), English botanist
- William Curtis (1746–1799), English botanist
- Georges Cuvier (1769–1832), French naturalist
Read more about this topic: List Of Biologists