Irving Langmuir, (1881–1957), chemist, physicist
Antoine Lavoisier, (1743–1794), French chemist
Joseph-Achille Le Bel (1847-1930), French chemist
Yuan T. Lee, (born 1936), 1986 Nobel Prize in Chemistry
Paul Émile Lecoq de Boisbaudran (1838-1912) French chemist
Jean-Marie Lehn (1939- ) French chemist, winner of 1987 Nobel Prize in Chemistry
Luis Federico Leloir (1906-1987) Argentine chemist, winner 1970 Nobel Prize in Chemistry
Phoebus Levene (1869-1940) Russian-American biochemist
Primo Levi, (1919–1987)
Gilbert N. Lewis, (1875–1946), American chemist, isolated heavy water
Henri Louis le Chatelier, (1850–1936) French chemist
Willard Libby (1908–1980), American chemist, 1960 Nobel Prize in Chemistry
Justus von Liebig, (1803–1873), German inventor
Fritz Albert Lipmann (1899-1986) German-American biochemist, winner of 1953 Nobel Prize in Medicine
Johann Josef Loschmidt (1821-1895) Austrian chemist
Martin Lowry, (1874–1936), British chemist
