•
Bernard Cabane (born 1945), physicist and chemist •
Pierre Jean George Cabanis (1757–1808), physiologist •
Albert Calmette (1863–1933), physician, bacteriologist and immunologist •
Georges Canguilhem (1904–1995), physician and philosopher •
Nicolas Léonard Sadi Carnot (1796–1832), physicist and military engineer •
Élie Cartan (1869–1951), mathematician •
Henri Cartan (1904–2008), mathematician •
Augustin-Louis Cauchy (1789–1857), mathematician and physicist •
Jean-François Champollion (1790–1832), philologist •
Jean-Pierre Changeux (born 1936), neurochemist •
Georges Charpak (1924–2010), physicist, Nobel prize winner 1992 •
Georges Charpy (1865–1945), physicist and metallurgist •
Henry Louis Le Chatelier (1850–1936), chemist known for
Le Chatelier's principle •
Albert Châtelet (1883–1960), mathematician •
Émilie du Châtelet (1706–1749), mathematician and physicist •
Jean Mathieu de Chazelles (1657–1710), professor of hydrography •
Michel Che (1941–2019), chemist •
Daniel Choquet (born 1962), neuroscientist •
Gustave Choquet (1915–2006), mathematician •
Yvonne Choquet-Bruhat (1923–2025), mathematician •
Charles Pierre Claret de Fleurieu (1738–1810), explorer, hydrographer and politician •
Alain Connes (born 1947), mathematician; Fields Medalist 1982 •
Louis Couffignal (1902–1966), mathematician and cybernetician •
Charles-Augustin de Coulomb (1736–1806), physicist, discoverer of
Coulomb's law •
Vincent Courtillot (born 1948), geophysicist •
Jacques-Yves Cousteau (1910–1997), oceanographer •
Philippe Cousteau (1940–1979), oceanographer •
Jean-Marie-Joseph Coutelle (1748–1835), engineer, scientist and pioneer of ballooning •
Adam de Craponne (1526–1576), engineer who implemented the
Canal de Craponne in 1559 •
Jean Cruveilhier (1791–1874), anatomist and pathologist •
Marie Curie (1867–1934), physicist and chemist, two Nobel Prizes, in physics (1903) and chemistry (1911) •
Pierre Curie (1859–1906), physicist and chemist, Nobel Prize in physics (1903) •
Georges Cuvier (1769–1832), regarded as the founding father of palaeontology •
Boris Cyrulnik (born 1937), ethologist, neurologist, and psychiatrist ==D==