- Maclean, [Sir] Harry Aubrey (de Vere) (1848-1920) (stories)
- See en.wikipedia.org/wiki/Harry_Aubrey_de_Vere_Maclean
- MacLean, Katherine (Anne) (1925- ) (stories) (assoc.)
- See www.sf-encyclopedia.com/entry/maclean_katherine
- Maclean, Norman (Fitzroy) (1902-1990) (stories)
- See en.wikipedia.org/wiki/Norman_Maclean
- MacLean, Robinson (1910-1960) (stories) (assoc.)
- Born in Idaho; magazine writer, author of biography of Haile Selassie, war correspondent, aircraft specifications engineer. Died in Tujunga, California (?).
- MacLeish, Archibald (1892-1982) (stories) (assoc.)
- See en.wikipedia.org/wiki/Archibald_MacLeish
- MacLellan, Charles A(rchibald) (1885-1961) (art)
- See en.wikipedia.org/wiki/Charles_Archibald_MacLellan
- MacLennan, (John) Hugh (1907-1990) (stories)
- See www.sf-encyclopedia.com/entry/maclennan_hugh
- MacLennan, Phyllis (1920-2012) (stories)
- See www.sf-encyclopedia.com/entry/maclennan_phyllis
- MacLeod, Adam Gordon (1883-1945) (stories)
- Born in Inverness, Scotland; died in Dorchester, Dorset, England.
- MacLeod, Angus (1906-1991) (stories) (assoc.)
- See www.sf-encyclopedia.com/entry/macleod_angus
- MacLeod, Crisetta (fl. 2000s-2010s) (stories)
- See crisettamacleodsblog.blogspot.co.uk
- MacLeod, Ian R. (1956- ) (stories) (assoc.)
- See www.sf-encyclopedia.com/entry/macleod_ian_r
- MacLeod, Jean S(utherland) (1908-2011) (stories)
- See en.wikipedia.org/wiki/Jean_S._MacLeod
- MacLeod, Joan (1954- ) (stories) (assoc.)
- See en.wikipedia.org/wiki/Joan_MacLeod
- MacLeod, Kate (fl. 2000s-2010s) (stories)
- See www.katemacleod.net/
- MacLeod, Ken(neth Macrae) (1954- ) (stories) (assoc.)
- See www.sf-encyclopedia.com/entry/macleod_ken
- MacLeod, Kevin J. (fl. 2010s) (stories)
- See theevilbuddha.wix.com/theevilbuddha
- MacLiesh, Dorothy (Delius Allan, née Black) (1890-1977) (stories)
- Born in Yorkshire; married Hugh MacLiesh in 1916; died in Scotland.
- MacLiesh, (Hugh) John (1918-1940) (stories)
- Captain in the Kings Own Royal Regiment, died on the Libyan Frontier, aged twenty-two.
- MacMahon, Bryan (1909-1998) (stories)
- See en.wikipedia.org/wiki/Bryan_MacMahon_(writer)
- MacMahon, William Marcus (1876-1931) (stories)
- See www.findagrave.com/cgi-bin/fg.cgi?page=gr&GRid=89270900
- Macmillan, (Maurice) Harold (, 1st Earl of Stockton) (1894-1986) (stories) (assoc.)
- See en.wikipedia.org/wiki/Harold_Macmillan
- MacMillan, Ian (Travis) (1941-2008) (stories) (assoc.)
- See en.wikipedia.org/wiki/Ian_MacMillan_(author)
- MacMillan, William (1890-1972) (stories)
- Born in Quebec.
- MacMitchell, (Thomas) Leslie (1920-2006) (stories)
- See en.wikipedia.org/wiki/Leslie_MacMitchell
- MacMunn, [Lt. Gen.] George (Fletcher) (1869-1952) (stories)
- Born in Chelsea, London, England; educated at Kensington and the Royal Military Academy; served in the Royal Artillery in India and Burma; also served in South Africa and Mesopotamia; was Quartermaster-General in India in the 1920s; died as Warden of Sackville College.
- MacMurchy, Marjory (1870-1938) (stories)
- See content.lib.sfu.ca/cdm/ref/collection/ceww/id/287
- MacMurdy, Natalie [née Hillman] (1901-1979) (stories)
- See www.newspapers.com/clip/31875490/the_times_leader/
- MacNab, Brynn (fl. 2010s) (stories) (assoc.)
- See www.brynnmacnab.blogspot.com
- Macnab, Peter (1830-1900) (stories) (art)
- See www.whistler.arts.gla.ac.uk/correspondence/people/biog/?bid=Macn_P&initial=M
- Macnamara, T(homas) J(ames) (1861-1931) (stories)
- See en.wikipedia.org/wiki/Thomas_James_Macnamara
- MacNamee, A. I. (1883-?) (stories)
- Journalist and salesman.
- Macnaughtan, S(arah Broom) (1864-1916) (stories)
- See en.wikipedia.org/wiki/Sarah_Broom_Macnaughtan
- MacNaughton, Laurence (fl. 2010s) (stories) (assoc.)
- See laurencemacnaughton.com
- MacNeal, Susan Elia (fl. 2010s) (stories) (assoc.)
- See www.susaneliamacneal.com
- MacNeil, Colin (fl. 1990s) (stories) (art)
- See en.wikipedia.org/wiki/Colin_MacNeil
- MacNichol, Kenneth (Hartley) (1887-1955) (stories)
- See tellersofweirdtales.blogspot.co.uk/2013/11/om-cabral-1887-1955.html
- MacPherson, Catriona (fl. 2010s) (stories)
- See catrionamcpherson.com
- Macpherson, Hector (Carsewell) (1851-1924) (stories)
- See en.wikipedia.org/wiki/Hector_C._Macpherson
- Macpherson, Hector Copland (1888-1956) (stories) (assoc.)
- See en.wikipedia.org/wiki/Hector_Macpherson_(astronomer)
- Macpherson, (Abbie) Jean (1886-1946) (stories)
- See en.wikipedia.org/wiki/Jeanie_MacPherson
- MacQuarrie, Peter (1969- ) (stories)
- See petermacquarrie.com
- Macquoid, Katharine S(arah) (1824-1917) (stories)
- Born in London; published over 50 volumes of fiction as well as travel books.
- MacRae, Andrew (fl. 2010s) (stories) (assoc.)
- See www.murdermisdirected.com
- MacRae, Michael (fl. 2010s) (art)
- See themichaelmacrae.deviantart.com
- MacRorie, R. B. (1877-?) (stories)
- Writer, journalist. Born in Milwaukee, Wisconsin.
- Macumber, Justin R. (fl. 2000s-2010s) (stories)
- See www.justinmacumber.com
- MacVicar, Angus (1908-2001) (stories)
- See www.sf-encyclopedia.com/entry/macvicar_angus
- MacWalter, Thom (1887-1963) (stories)
- See www.sf-encyclopedia.com/entry/macclure_victor
- MacWhirter, John (A.) (1837-1911) (stories) (art) (assoc.)
- See en.wikipedia.org/wiki/John_MacWhirter
- Macy, Frederick S(tevens) (1876-?) (stories)
- Military writer. Born in Detroit, Michigan.
- Madden, (Jerry) David (1933- ) (stories)
- See en.wikipedia.org/wiki/David_Madden_(novelist)
- Madden, Paco José (fl. 2010s) (stories)
- See www.beltwaypoetry.com/poetry/poets/names/madden-paco-jose
- Maddick, Herbert (?-1915) (stories)
- See ourheroes.southdublinlibraries.ie/node/16424
- Maddock, Larry; pseudonym of Jack Jardine (1931-2009) (stories) (assoc.)
- See www.sf-encyclopedia.com/entry/maddock_larry
- Maddox, Tom (fl. 1980s-1990s) (stories) (assoc.)
- See www.sf-encyclopedia.com/entry/maddox_tom
- Maddux, Rachel (1912-1983) (stories) (assoc.)
- See www.sf-encyclopedia.com/entry/maddux_rachel
- Madeleine, Julia (fl. 2010s) (stories)
- See www.goodreads.com/author/show/1421418.Julia_Madeleine
- Madeleva, Sister M. [born Mary Evaline Wolff] (1887-1964) (stories)
- See en.wikipedia.org/wiki/Madeleva_Wolff
- Madigan, Edward P(atrick) (1896-1966) (stories)
- See en.wikipedia.org/wiki/Slip_Madigan
- Madle, Robert A(lbert) (1920- ) (stories) (assoc.)
- See fancyclopedia.org/bob-madle
- Madsen, Axel (1930-2007) (stories) (assoc.)
- See www.sf-encyclopedia.com/entry/madsen_axel
- Mae, Samuel (fl. 2010s) (stories)
- See www.samuelmae.info
- Maël, Pierre; pseudonym of Charles Causse (1862-1904) & Charles Vincent (1851-1920) (stories)
- See www.roman-daventures.com/auteurs/france/mael/mael.htm
- Maeterlinck, Maurice (Polydore Marie Bernard) (1862-1949) (stories) (assoc.)
- See en.wikipedia.org/wiki/Maurice_Maeterlinck
- Maffini, Mary Jane (1947- ) (stories)
- Librarian turned mystery bookstore owner in Ottawa.
- Magahiz, Rich (fl. 2000s-2010s) (stories)
- See frabjoustimes.magahiz.com/pages/about
- Magas, N. J. (fl. 2010s) (stories)
- See njmagas.wordpress.com
- Mağden, Perihan (1960- ) (stories)
- See en.wikipedia.org/wiki/Perihan_Ma%C4%9Fden
- Magee, John Gillespie, Jr. (1922-1941) (stories)
- See en.wikipedia.org/wiki/John_Gillespie_Magee,_Jr.
- Maggin, Elliot S. (1950- ) (stories) (assoc.)
- See www.sf-encyclopedia.com/entry/maggin_elliot_s
- Magidoff, Robert (1905-1970) (stories)
- See www.sf-encyclopedia.com/entry/magidoff_robert
- Maginn, William (1793-1842) (stories)
- See www.sf-encyclopedia.com/entry/maginn_william
- Maglione, Fran (fl. 2010s) (stories)
- See www.goodreads.com/author/show/14427958.Fran_Maglione
- Magnozz, Alejandro (fl. 2010s) (art)
- See mgnz.deviantart.com
- Magnus, George G. (1859?-1941?) (stories)
- Managing director of the Cambridge Literary Agency of London, and author of How to Write Saleable Fiction.
- Magnus, Laurie (1872-1933) (stories)
- See cosmos.ucc.ie/cs1064/jabowen/IPSC/php/authors.php?auid=21307
- Magnus, Philip (1842-1933) (stories)
- See en.wikipedia.org/wiki/Philip_Magnus
- Magnusson, Magnus (fl. 1920s-2000s) (stories) (assoc.)
- See en.wikipedia.org/wiki/Magnus_Magnusson
- Magrs, Paul (1969- ) (stories) (assoc.)
- See www.sf-encyclopedia.com/entry/magrs_paul
- Maguire, Robert (A.) (1921-2005) (art)
- See en.wikipedia.org/wiki/Robert_Maguire
- Maguire, Robert Augustine Joseph (1898-?) (stories)
- Writer. Born in Dublin, Ireland; lived in England.
- Maguire, Walter Haynes (1876?-1910?) (stories)
- If these are the correct dates, he was born in Philadelphia and died in Chicago.
- Mahaffay, Robert E(rvine) (1890-1967) (stories)
- Interested in railroads.
- Mahannah, Floyd (1911-1976) (stories) (assoc.)
- Also wrote mysteries.
- Mahjoub, Jamal (1966- ) (stories)
- See en.wikipedia.org/wiki/Jamal_Mahjoub
- Mahon, Derek (1941- ) (stories)
- See en.wikipedia.org/wiki/Derek_Mahon
- Mahony, Francis Sylvester (1804-1866) (stories)
- See en.wikipedia.org/wiki/Francis_Sylvester_Mahony
- Mahony, Frank P. (1862-1916) (art)
- See en.wikipedia.org/wiki/Frank_P._Mahony
- Mahr, Kurt; pseudonym of Klaus Mahn (1936-1993) (stories) (assoc.)
- See www.sf-encyclopedia.com/entry/mahr_kurt
- Maier, Howard (1906?-1983) (stories)
- Political specialist, television director, author. Died in Hollandale, Florida.
- Mailer, Norman (Kingsley) (1923-2007) (stories) (assoc.)
- Major novelist, short story writer, poet, essayist, playwright, media figure. Born in Long Branch, New Jersey. Husband of Norris Church Mailer.
- Mailer, Norris Church (1949-2010) (stories)
- Wife of Norman Mailer.
- Maimon, Solomon (1753-1800) (stories) (assoc.)
- See en.wikipedia.org/wiki/Salomon_Maimon
- Maine, Charles Eric; pseudonym of David McIlwain (1921-1981) (stories) (assoc.)
- See www.sf-encyclopedia.com/entry/maine_charles_eric
- Mains, Geoff (1947- ) (stories) (assoc.)
- See www.goodreads.com/author/show/640464.Geoff_Mains
- Mains, Johnny (1976- ) (stories) (assoc.)
- See en.wikipedia.org/wiki/Johnny_Mains