K
- Henri B. Kagan, (born 1930), 2001 Wolf Prize in Chemistry
- Jerome Karle, (born 1918), 1985 Nobel Prize in Chemistry
- Paul Karrer, (1889–1971), 1937 Nobel Prize in Chemistry
- Karl Wilhelm Gottlob Kastner (1783–1857)
- August Kekulé, (1829–1896), German organic chemist
- John Kendrew, (1917–1997), 1962 Nobel Prize in Chemistry
- Petrus Jacobus Kipp, (1808–1864), Dutch chemist, inventor of Kipp-generator
- Johan Kjeldahl, (1849–1900), Danish chemist, head chemist at Carlsberg Brewery, methods still in use
- Martin Heinrich Klaproth, (1743–1817), German chemist, discovered the element Uranium
- Trevor Kletz (born 1922) British promoter of industrial safety
- Aaron Klug, (born in 1926), winner of the 1982 Nobel Prize in Chemistry
- Emil Knoevenagel, (1865–1921)
- William Standish Knowles, (born 1917), 2001 Nobel Prize in Chemistry
- Walter Kohn, (born 1923), 1998 Nobel Prize in Chemistry.
- Adolph Wilhelm Hermann Kolbe, (1818–1884), German chemist known for Kolbe nitrile synthesis
- Izaak Kolthoff, (1894–1993), Dutch-American chemist, the "Father of Analytical Chemistry"
- Roger D. Kornberg, (born 1947), 2006 Nobel Prize in Chemistry
- Hans A. Krebs, (1900–1981), German biochemist, work on metabolic cycles
- Harold Kroto, (born 1939), English chemist, 1996 Nobel Prize in Chemistry
- Richard Kuhn (1900–1967), 1938 Nobel Prize in Chemistry.
Read more about this topic: List Of Chemists