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- Alan MacDiarmid, (1927–2007), 2000 Nobel Prize in Chemistry
- Carolina Henriette Mac Gillavry, (1904–1993), Dutch chemist and crystallographer
- Roderick MacKinnon, (born 1956), 2003 Nobel Prize in Chemistry
- Pierre Macquer, (1718–1784), influential French chemist
- Rudolph A. Marcus, (born 1923), 1992 Nobel Prize in Chemistry
- Jacob A. Marinsky, (1918–2005), American chemist, co-discovered the element promethium
- Jean Charles Galissard de Marignac, (1817–1894), Swiss chemist, discovered ytterbium and co-discovered gadolinium.
- Vladimir Vasilevich Markovnikov, (1838–1904)
- Tobin J. Marks, (1944), American inorganic chemist and material scientist
- Alan G. Marshall, American chemist, co-inventor of Fourier transform ion cyclotron resonance (FT-ICR) mass spectrometry
- Archer John Porter Martin, (1910–2002), 1952 Nobel Prize in Chemistry
- Martinus van Marum, (1750–1837), Dutch chemist
- Elmer McCollum, (1879–1967), American Biochemist, known for work of diet on health
- Edwin McMillan, (1907–1991), 1951 Nobel Prize in Chemistry
- Lise Meitner, (1878–1968), German physicist
- Dmitri Ivanovich Mendeleev, (1834–1907), Russian chemist, creator of the Periodic table of elements
- John Mercer, (1791–1866), chemist and industrialist
- Robert Bruce Merrifield, (1921–2006), solid-phase chemist, 1984 Nobel Prize in Chemistry
- Julius Lothar Meyer, (1830–1895),German chemist, important work on The periodic table of elements; not to be confused with:
- Viktor Meyer, (1848–1897)
- August Michaelis (1847–1916), German chemist
- Hartmut Michel, (born 1948), 1988 Nobel Prize in Chemistry
- Stanley Miller (born 1930), American chemist, best known for the Miller-Urey experiment
- Luis E. Miramontes (1925–2004), co-inventor of the combined oral contraceptive pill
- Peter D. Mitchell, (1920–1992), 1978 Nobel Prize in Chemistry
- William A. Mitchell, (1911–2004), key inventor behind Pop Rocks, Tang, and Kool Whip
- Eilhardt Mitscherlich, (1794–1863) German chemist, remembered for the law of isomorphism.
- Alexander Mitscherlich, (1836–1918), chemist
- Karl Friedrich Mohr, (1806–1879), German chemist famous for first musings on the Conservation of energy
- Henri Moissan, (1852–1907), French chemist and the winner of the 1906 Nobel Prize in Chemistry
- Mario J. Molina, (born 1943), 1995 Nobel Prize in Chemistry
- Jacques Monod, (1910–1976), biochemist, winner of Nobel Prize in Physiology or Medicine in 1965
- Jeffrey S. Moore (born 1961), American Material Chemist
- Peter Moore (born 1939), American biochemist, Sterling Professor of Chemistry at Yale University
- Stanford Moore, (1913–1982), 1972 Nobel Prize in Chemistry
- Henry Gwyn Jeffreys Moseley (1887–1915), English physicist, discovered Moseley's law
- Gerardus Johannes Mulder, (1802–1880), Dutch organic chemist
- Paul Müller, Swiss chemist, (1899–1965), discovered DDT, won the Nobel Prize in Physiology or Medicine in 1939
- Robert S. Mulliken, (1896–1986), American physicist, chemist, 1966 Nobel Prize in Chemistry
- Kary Mullis, (born 1944), 1993 Nobel Prize in Chemistry
- Earl Muetterties, (1927–1984) American chemist
Read more about this topic: List Of Chemists