Editing List of physicists (section)

== M ==

*[[Arthur B. McDonald]] – Canada (born 1943) Nobel laureate
*[[Carolina Henriette MacGillavry]] – Netherlands (1904–1993)
*[[Ernst Mach]] – Austria-Hungary (1838–1916)
*[[Katie Mack (astrophysicist)]] – United States (born 1981)
*[[Gladys Mackenzie]] – Scotland (1903–1972)
*[[Ray Mackintosh]] – U.K. 
*[[Luciano Maiani]] – Italy, San Marino (born 1941)
*[[Theodore Maiman]] – United States (1927–2007)
*[[Arthur Maitland]] – U.K. (1925–1994)
*[[Ettore Majorana]] – Italy (1906–1938 presumed dead)
*[[Sudhansu Datta Majumdar]] – India (1915–1997)
*[[Richard Makinson]] – Australia (1913–1979)
*[[Juan Martín Maldacena]] – Argentina (born 1968)
*[[Étienne-Louis Malus]] – France (1775–1812)
*[[Leonid Isaakovich Mandelshtam]] – Imperial Russia, Soviet Union (1879–1944)
*[[Franz Mandl (physicist)|Franz Mandl]] – U.K. (1923–2009)
*[[Charles Lambert Manneback]] – Belgium (1894–1975)
*[[Peter Mansfield]] – U.K. (1933–2017)
*[[Carlo Marangoni]] – Italy (1840–1925)
*[[M. Cristina Marchetti]] – Italy, United States (born 1955)
*[[Guglielmo Marconi]] – Italy (1874–1937) Nobel laureate
*[[Henry Margenau]] – Germany, United States (1901–1977)
*[[Nina Marković]] – Croatia, United States 
*[[William Markowitz]] – United States (1907–1998)
*[[Laurence D. Marks]] – United States (born 1954)
*[[Robert Marshak]] – United States (1916–1992)
*[[Walter Marshall, Baron Marshall of Goring|Walter Marshall]] – U.K. (1932–1996)
*[[Toshihide Maskawa]] – Japan (1940–2021) Nobel laureate
*[[Harrie Massey]] – Australia (1908–1983)
*[[John C. Mather|John Cromwell Mather]] – United States (born 1946) Nobel laureate
*[[James Clerk Maxwell]] – U.K. (1831–1879)
*[[Brian May]] – U.K. (born 1947)
*[[Maria Goeppert Mayer]] – Germany, United States (1906–1972)
*[[Ronald E. McNair]] – United States (1950–1986)
*[[Anna McPherson]] – Canadian (1901–1979) 
*[[Simon van der Meer]] – Netherlands (1925–2011) Nobel laureate
*[[Lise Meitner]] – Austria (1878–1968)
*[[Fulvio Melia]] – United States (born 1956)
*[[Macedonio Melloni]] – Italy (1798–1854)
*[[Adrian Melott]] – United States (born 1947)
*[[Thomas Corwin Mendenhall]] – United States (1841–1924)
*[[Mambillikalathil Govind Kumar Menon|M. G. K. Menon]] – India (1928–2016)
*[[David Merritt]] – United States
*[[Albert Abraham Michelson]] – United States (1852–1931) Nobel laureate
*[[Arthur Alan Middleton]] – United States 
*[[Stanislav Mikheyev]] – Russia (1940–2011)
*[[Robert Millikan|Robert Andrews Millikan]] – United States (1868–1953) Nobel laureate
*[[Robert Mills (physicist)|Robert Mills]] – United States (1927–1999)
*[[Arthur Milne]] – U.K. (1896–1950)
*[[Shiraz Minwalla]] – India (born 1972)
*[[Bedangadas Mohanty]] – India (born 1973)
*[[Rabindra Mohapatra|Rabindra Nath Mohapatra]] – India, United States (born 1944)
*[[Kathryn Moler]] – United States
*[[Merritt Moore]] – United States (born 1988)
*[[Tanya Monro]] – Australia (born 1973)
*[[John J. Montgomery]] – United States (1858–1911)
*[[Jagadeesh Moodera]] – India, United States (born 1950)
*[[Henry Moseley]] – U.K. (1887–1915)
*[[Rudolf Mössbauer]] – Germany (1929–2011) Nobel laureate
*[[Nevill Mott]] – U.K. (1905–1996) Nobel laureate
*[[Ben Roy Mottelson]] – Denmark, United States (1926–2022) Nobel laureate
*[[Amédée Mouchez]] – Spain, France (1821–1892)
*[[Moustafa Mosharafa|Ali Moustafa]] – Egypt (1898–1950)
*[[José Enrique Moyal]] – Palestine, France, U.K., United States, Australia (1910–1998)
*[[Christine Muschik]] – Germany
*[[Karl Alexander Müller]] – Switzerland (1927–2023) Nobel laureate
*[[Richard A. Muller]] – United States (born 1944)
*[[Robert S. Mulliken]] – United States (1896–1986)
*[[Pieter van Musschenbroek]] – Netherlands (1692–1762)