- Mack, S. M. (fl. 2010s) (stories)
- See whatsmacksaid.com
- Mack, Thomas (Daniel) (1891-?) (stories)
- Born in Rochester, New York; author and salesman; death not traced.
- Mackay, Charles (1814-1889) (stories)
- See en.wikipedia.org/wiki/Charles_Mackay_(author)
- Mackay, Lewis Hugh (1897-1963) (stories)
- Born in Bengal, India. Husband of Barbara James.
- Mackelworth, R(onald) W(alter) (1930- ) (stories)
- See www.sf-encyclopedia.com/entry/mackelworth_r_w
- Mackenzie, Ashley (fl. 2010s) (stories) (art) (assoc.)
- See ashmackenzie.com
- Mackin, Edward (fl. 1950s-1960s) (stories) (assoc.)
- See en.wikipedia.org/wiki/Edward_Mackin
- Mackintosh, Charles Henry (1885-?) (stories)
- See tellersofweirdtales.blogspot.co.uk/2016/05/charles-henry-mackintosh-1885.html
- Mackintosh, Paul StJohn (1961- ) (stories)
- See paulstjohnmackintosh.com/about/
- MacLean, Alistair (Stuart) (1922-1987) (stories) (assoc.)
- See en.wikipedia.org/wiki/Alistair_MacLean
- MacLean, Katherine (Anne) (1925- ) (stories) (assoc.)
- See www.sf-encyclopedia.com/entry/maclean_katherine
- MacLeish, Archibald (1892-1982) (stories)
- See en.wikipedia.org/wiki/Archibald_MacLeish
- MacLennan, Phyllis (1920-2012) (stories)
- See www.sf-encyclopedia.com/entry/maclennan_phyllis
- 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, 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
- MacMahon, William Marcus (1876-1931) (stories)
- See www.findagrave.com/cgi-bin/fg.cgi?page=gr&GRid=89270900
- MacMillan, Ian (Travis) (1941-2008) (stories) (assoc.)
- See en.wikipedia.org/wiki/Ian_MacMillan_(author)
- MacNab, Brynn (fl. 2010s) (stories) (assoc.)
- See www.brynnmacnab.blogspot.com
- MacNaughton, Laurence (fl. 2010s) (stories) (assoc.)
- See laurencemacnaughton.com
- MacNeil, Colin (fl. 1990s) (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, Hector Copland (1888-1956) (stories) (assoc.)
- See en.wikipedia.org/wiki/Hector_Macpherson_(astronomer)
- MacQuarrie, Peter (1969- ) (stories)
- See petermacquarrie.com
- MacRae, Andrew (fl. 2010s) (stories)
- See www.murdermisdirected.com
- MacRae, Michael (fl. 2010s) (art)
- See themichaelmacrae.deviantart.com
- Macumber, Justin R. (fl. 2000s-2010s) (stories)
- See www.justinmacumber.com
- MacWalter, Thom (1887-1963) (stories)
- See www.sf-encyclopedia.com/entry/macclure_victor
- Madden, (Jerry) David (1933- ) (stories)
- See en.wikipedia.org/wiki/David_Madden_(novelist)
- 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
- 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
- Maeterlinck, Maurice (Polydore Marie Bernard) (1862-1949) (stories)
- 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
- 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
- Maglione, Fran (fl. 2010s) (stories)
- See www.goodreads.com/author/show/14427958.Fran_Maglione
- Magnozz, Alejandro (fl. 2010s) (art)
- See mgnz.deviantart.com
- 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
- Mahaffay, Robert E(rvine) (1890-1967) (stories)
- Interested in railroads.
- Mahr, Kurt; pseudonym of Klaus Mahn (1936-1993) (stories) (assoc.)
- See www.sf-encyclopedia.com/entry/mahr_kurt
- 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
- Major, J. Michael (fl. 1980s-2010s) (stories)
- See jmichaelmajor.com
- Major, Tim (fl. 2010s) (stories) (assoc.)
- See cosycatastrophes.wordpress.com
- Makin, William J(ames) (1894-1944) (stories)
- See www.sf-encyclopedia.com/entry/makin_william_j
- Maksym, Eileen (fl. 2010s) (stories)
- See eileenmaksym.com
- Malamud, Bernard (1914-1986) (stories)
- See en.wikipedia.org/wiki/Bernard_Malamud
- Malan, Danelle (fl. 2010s) (art)
- See www.behance.net/DanelleMalan
- Malcolm, Dominica (1983- ) (stories)
- See dominica.malcolm.id.au/
- Malcolm, Donald (1930-2013) (stories) (assoc.)
- See www.sf-encyclopedia.com/entry/malcolm_donald
- Malcolm, Roy; pseudonym of Donald Malcolm (1930-2013) (stories)
- See www.sf-encyclopedia.com/entry/malcolm_roy
- Malcolm-Clarke, Darja (fl. 2000s-2010s) (stories)
- See www.goodreads.com/author/show/1621455.Darja_Malcolm_Clarke
- Malcolm-Smith, George (1901-1984) (stories)
- Born in Vermont; died in Hartford, Connecticut; editor of an insurance company periodical.
- Malerba, Luigi [born Luigi Bonardi] (1927-2008) (stories)
- See en.wikipedia.org/wiki/Luigi_Malerba
- Malfi, Ronald Damien (fl. 2000s-2010s) (stories) (assoc.)
- See en.wikipedia.org/wiki/Ronald_Malfi
- Malik, Usman Tanveer (fl. 2000s-2010s) (stories) (assoc.)
- See www.usmanmalik.org
- Mallan, Lloyd (1914-1973) (stories) (assoc.)
- Reporter and writer. Born in Pittsburgh, Pennsylvania; lived in New York.
- Mallett, Daryl F(urumi) (1969- ) (stories)
- See www.sf-encyclopedia.com/entry/mallett_daryl_f
- Mallorquí, César (1953- ) (stories)
- See es.wikipedia.org/wiki/C%C3%A9sar_Mallorqu%C3%AD
- Mallory, James (fl. 1990s-2010s) (stories) (assoc.)
- See merlinscribe.com
- Mallove, Eugene F(ranklin) (1947-2004) (stories)
- See en.wikipedia.org/wiki/Eugene_Mallove
- Maloney, Iain (fl. 2010s) (stories)
- See iainmaloney.wordpress.com
- Malory, [Sir] Thomas ({c}1415-1471) (stories) (assoc.)
- See en.wikipedia.org/wiki/Thomas_Malory
- Maltese, Racheline (1972- ) (stories) (assoc.)
- See avian30.com
- Malzberg, Barry N(athaniel) (1939- ) (stories) (assoc.)
- See www.sf-encyclopedia.com/entry/malzberg_barry_n
- Mamatas, Nick [i.e., Nicholas Mamatas] (1972- ) (stories) (assoc.)
- See www.sf-encyclopedia.com/entry/mamatas_nick
- Mammone, Robert (fl. 2010s) (stories)
- See robertmammone.wordpress.com
- Manchess, Gregory (1955- ) (stories) (art)
- See en.wikipedia.org/wiki/Gregory_Manchess
- Mancini, (George) Don(ald) (1963- ) (stories) (assoc.)
- See en.wikipedia.org/wiki/Don_Mancini
- Mandem; pseudonym of Maize Arendsee (fl. 2010s) & Moco Steinman-Arendsee (fl. 2010s) (art)
- See lunchticket.org/mandem-interview
- Mandrachio, Richard (fl. 2010s) (art)
- See www.mandrachio.yolasite.com
- Manenzhe, Reoketwe (fl. 2010s) (stories)
- See resoketswe.wordpress.com
- Manetti, Lisa (fl. 2000s-2010s) (stories) (assoc.)
- See www.lisamannetti.com
- Mangham, Herbert Joseph (1896-1967) (stories)
- See tellersofweirdtales.blogspot.co.uk/2016/01/herbert-j-mangham-1896-1967.html
- Manglis, Alexandra (fl. 2010s) (stories)
- See strangehorizons.com/author/alexandra-manglis/
- Mangum, Lucas (fl. 2010s) (stories)
- See lucasmangumauthor.com
- Manickavel, Kuzhali (fl. 2000s-2010s) (stories)
- See en.wikipedia.org/wiki/Kuzhali_Manickavel
- Mankiller, Katherine (fl. 2000s-2010s) (stories)
- See www.katherinemankiller.com
- Manley, Islay (1909-1984) (stories) (assoc.)
- See www.findagrave.com/memorial/170745324/islay-manley
- Manley, Mark (fl. 2010s) (art)
- See markmanley.co.uk
- Manlove, C(olin) N(icholas) (1942- ) (stories) (assoc.)
- See www.sf-encyclopedia.com/entry/manlove_c_n
- Mann, E(dward) B(everly) (1902- ) (stories)
- Author of westerns, editor. Born in Hollis, Kansas.
- Mann, George (1978- ) (stories) (assoc.)
- See www.sf-encyclopedia.com/entry/mann_george
- Mann, (Anthony) Phillip (1942- ) (stories) (assoc.)
- See www.sf-encyclopedia.com/entry/mann_phillip
- Manners, David X. (1912-2007) (stories)
- According to his son Tim he wasnt actually David X. Manners but was David X Manners as the X was his whole name and not an initial.
- Mannetti, Lisa (fl. 2000s-2010s) (stories)
- See www.lisamannetti.com/about.htm
- Manning, Dan (W.) (fl. 2000s-2010s) (stories)
- See www.danmanning.com
- Manning, Laurence (Edward) (1899-1972) (stories) (assoc.)
- See www.sf-encyclopedia.com/entry/manning_laurence
- Manning, Timothy; pseudonym of Tom Moran (fl. 2000s-2010s) (stories)
- See www.filmfodder.com/fearfodder/archives/2008/07/just_who_is_black_ink_horrors.shtml