- Mills, [Lady] Dorothy (Rachel Melissa) (1889-1959) (stories)
- See www.sf-encyclopedia.com/entry/mills_dorothy
- Millward, Edward J(oseph) (1895-1980) (stories)
- Born in South Africa, but lived as a child in Wales; studied at the Leeds Training School for Teachers; died in Wycombe, Buckinghamshire, England.
- Milne, A(lan) A(lexander) (1882-1956) (stories) (assoc.)
- See en.wikipedia.org/wiki/A._A._Milne
- Mims, Kevin (fl. 2010s) (stories)
- See open.salon.com/blog/kevinmims
- Mina, Denise (1966- ) (stories) (assoc.)
- Grew up in London; has degree in English Literature from Oxford; living in Glasgow.
- Miner, Mike (fl. 2010s) (stories)
- See shotgunhoney.net/authors/mike-miner
- Mines, Samuel (1909-1986) (stories)
- See www.sf-encyclopedia.com/entry/mines_samuel
- Missimer, Wilson Clay (1885-1966) (stories)
- See www.findagrave.com/memorial/129045069/wilson-clay-missimer
- Mitchell, K(enya) T. (fl. 2000s) (stories)
- See www.kenyamitchell.com
- Mitchell, S(ilas) Weir, M.D. (1829-1914) (stories)
- See en.wikipedia.org/wiki/Silas_Weir_Mitchell
- Mitelman, Cristian (1971- ) (stories)
- born in Buenos Aires, Professor in Classic Literature.
- Mitzner, Adam (fl. 2010s) (stories) (assoc.)
- See adammitzner.com
- MLevy, James ({c}1801-?) (stories)
- Name usually given as McLevy, James.
- Moffett, Cleveland (Langston) (1863-1926) (stories)
- See www.sf-encyclopedia.com/entry/moffett_cleveland
- Moffett, Julie (fl. 1990s-2010s) (stories)
- See www.juliemoffett.com
- Moffett, Patricia (fl. 2000s) (art)
- See www.patriciamoffett.com
- Moffitt, Donald (C.) (1931-2014) (stories)
- See www.sf-encyclopedia.com/entry/moffitt_donald
- Mollin, Greg (fl. 2010s) (stories)
- See www.gregmollin.com
- Monaghan, Sean (fl. 2000s-2010s) (stories)
- See seanmonaghanwriter.wordpress.com
- Monninger, Joseph (1953- ) (stories)
- See en.wikipedia.org/wiki/Joseph_Monninger
- Montana, Ron(ald Anthony) (1943- ) (stories) (assoc.)
- See www.sf-encyclopedia.com/entry/montana_ron
- Monteleone, Thomas F(rancis, Jr.) (1946- ) (stories)
- See www.sf-encyclopedia.com/entry/monteleone_thomas_f
- Montes, Raphael (1990- ) (stories) (assoc.)
- See www.raphaelmontes.com.br/biografia
- Montgomery, David J. (fl. 2000s-2010s) (stories)
- See www.davidjmontgomery.com/bio.html
- Montgomery, Ione [i.e., Ione C. Montgomery Lonergan] (1883-1972) (stories)
- Born in Missouri; married Philip J. Lonergan; died in Seattle.
- Montgomery, Leslie Alexander (1873-1961) (stories)
- See www.culturenorthernireland.org/features/performing-arts/leslie-montgomery
- Montross, Lynn J. (1895-1961) (stories)
- Author, journalist, military historian. Born Battle Creek, Nebraska; died in Washington, D.C.
- Moon, (Susan) Elizabeth N(orris) (1945- ) (stories)
- See www.sf-encyclopedia.com/entry/moon_elizabeth
- Moore, Alan (1953- ) (stories) (assoc.)
- See en.wikipedia.org/wiki/Alan_Moore
- Moore, Brian (1921-1999) (stories)
- See en.wikipedia.org/wiki/Brian_Moore_(novelist)
- Moore, C(harles) Dennis (1972- ) (stories)
- See www.cdennismoore.com
- Moore, C(atherine) L(ucille) (1911-1987) (stories)
- See www.sf-encyclopedia.com/entry/moore_c_l
- Moore, Christopher (George) (1952- ) (stories) (assoc.)
- See en.wikipedia.org/wiki/Christopher_G._Moore
- Moore, [Captain] Frederick Ferdinand (1877-1947) (stories)
- Editor, author, sailor, civilian scout, war correspondent. One of the intelligence officers dispatched by the United States to Siberia in the summer of 1918. Briefly married to Eleanor Gates. Research on this man is difficult, hampered by the presence of author Frederick Moore (1877-1956?). Even the Library of Congress has treated the two men as being the same. Frederick Ferdinand Moore was born in Concord, New Hampshire; apparently still alive in 1954.
- Moore, Miriam Ann (Rogow) (1964- ) (stories)
- Corporate travel specialist in San Francisco. Daughter of Roberta Rogow.
- Moore, Ralph Robert (fl. 1980s-2010s) (stories)
- See www.ralphrobertmoore.com
- Moore, Richard A. (1946- ) (stories)
- Newsman, later press secretary for U.S. senator.
- Moore, Robin [i.e., Robert Lowell Moore, Jr.] (1925-2008) (stories)
- See www.sf-encyclopedia.com/entry/moore_robin
- Moore, Roger (George) (1927-2017) (stories)
- See en.wikipedia.org/wiki/Roger_Moore
- Moorhead, M. V. (fl. 2010s) (stories)
- See mvmoorhead.blogspot.co.uk
- Moose, Ruth (fl. 1970s-2010s) (stories)
- See ruthmoose.com
- Moquist, Richard W. (1950- ) (stories)
- Born in St. Paul; has a degree in pharmacy; living in North Dakota.
- Moran, Terrie Farley (fl. 2000s-2010s) (stories) (assoc.)
- See terriefarleymoran.com
- Mordaunt, Evelyn May [name adopted by deed poll in 1915] (1872-1942) (stories)
- Born Evelin May Clowes in Cotgrave, Nottinghamshire; married Maurice Wilhemn Wiehe in Mauritius in 1898; went to Australia in 1902; lived in London during WWI; died in Oxford; writings appeared under a number of pseudonyms.
- Morehouse, Ward (1895-1966) (stories)
- See en.wikipedia.org/wiki/Ward_Morehouse
- Moreno-Garcia, Silvia (fl. 2000s-2010s) (stories)
- See silviamoreno-garcia.com/blog/about
- Morey, Leo [i.e., Leopoldo Morey y Pena] (1899-1965) (art)
- See pulpartists.com/Morey.html
- Morey, Walt(er Nelson) (1907- ) (stories)
- A writer best known for his animal stories such as Gentle Ben (1965) and Kavik, the Wolf Dog (1968). He was born in Hoquiam, Washington.
- Morgan, Bassett; pseudonym of Grace Jones (1884-1977) (stories)
- See desturmobed.blogspot.co.uk/2011/12/bassett-morgan.html
- Morgan, Dan (1925-2011) (stories)
- See www.sf-encyclopedia.com/entry/morgan_dan
- Morgan, Howard E(lmer) (1892?-1933) (stories)
- Writer of westerns and animal stories. Born in Unionville, Connecticut; died in Hartsdale, New York.
- Morita, Pat [i.e., Noriyuki Morita] (1932-2005) (stories) (assoc.)
- See en.wikipedia.org/wiki/Pat_Morita
- Morley, Blythe [i.e., Blythe Morley Brennan] (1923-2002) (stories)
- See desturmobed.blogspot.co.uk/2011/06/stanley-hopkins-jr.html
- Morley, Christopher (Darlington) (1890-1957) (stories) (assoc.)
- See en.wikipedia.org/wiki/Christopher_Morley
- Morrell, David (Bernard) (1943- ) (stories) (assoc.)
- See en.wikipedia.org/wiki/David_Morrell
- Morrell, Ed (1868-1946) (stories)
- See en.wikipedia.org/wiki/Edward_Morrell
- Morressy, John (1930-2006) (stories)
- See www.sf-encyclopedia.com/entry/morressy_john
- Morrigan, Taire Lilith (fl. 2010s) (stories) (assoc.)
- See morriganart.weebly.com/the-artist.html
- Morris, Edward A. (1912?-1996?) (stories)
- Born in Rhode Island; a pilot living in New York City.
- Morris, Gordon (Bradman) (1898-1940) (stories)
- Born in Westchester, New York; died in Los Angeles; actor and playwright.
- Morris, S. Brent (fl. 2010s) (stories)
- See en.wikipedia.org/wiki/S._Brent_Morris
- Morrone, Wenda Wardell (1942- ) (stories)
- Raised and living in Montana.
- Moser, J. A. (fl. 2010s) (stories)
- See www.jamoser.com
- Moses, Kingsley (1890?-?) (stories)
- Journalist, editor, spent time abroad. Born in Philadelphia, Pennsylvania; lived in East Hampton, New York.
- Mosiman, Billie Sue (1947-2018) (stories) (assoc.)
- See www.fantasticfiction.com/m/billie-sue-mosiman/
- Moskowitz, Sam(uel Martin) (1920-1997) (stories)
- See www.sf-encyclopedia.com/entry/moskowitz_sam
- Mosley, Walter (Ellis) (1952- ) (stories) (assoc.)
- See www.sf-encyclopedia.com/entry/mosley_walter
- Moss, Alan L., Ph.D. (fl. 2010s) (stories)
- See www.alanlmoss.com
- Moss, Todd (fl. 2010s) (stories) (assoc.)
- See toddmossbooks.com
- Mott, Edward Spencer (1844-1910) (stories)
- Born in Staffordshire; after army service in India and Burma pursued a theatrical career, writing operettas, pantomimes and burlesques.
- Motz, Jutta (fl. 2000s-2010s) (stories)
- See www.jutta-motz.com/english
- Mourlevat, Jean-Claude (1952- ) (stories)
- See fr.wikipedia.org/wiki/Jean-Claude_Mourlevat
- Mowery, William Byron (1899-1957) (stories)
- Teacher, naturalist and novelist. Born in Adelphia, Ohio; on faculty at University of Illinois, then became full time writer, with more than 450 published stories, screenwriter.
- Muddock, J(ames) E(dward) (1843-1934) (stories)
- Born in Southampton; educated partly in India and began working in a gun foundry near Calcutta; traveled widely in the East, writing for English papers and magazines.
- Muir, Barbara Kenwick Gowing (1908-1998) (stories)
- Born in Saxmundham, Suffolk; writer and bookseller through her husband, Percy M. Muir, a director of the publishing firm of Elkin Mathews, which she continued after his death in 1979. Daughter of Sidney (David) Gowing.
- Muir, Ward (1878-1927) (stories)
- See www.sf-encyclopedia.com/entry/muir_ward
- Muk, Derek (fl. 1990s-2010s) (stories)
- See theoccultfilesofalberttaylor.wordpress.com/about
- Mulford, Clarence E(dward) (1883-1956) (stories)
- See en.wikipedia.org/wiki/Clarence_E._Mulford
- Mulford, (Mitchell) Stockton (1886-1960) (art)
- See pulpartists.com/Mulford.html
- Mulhall, John (fl. 2010s) (stories) (assoc.)
- See www.johnmulhall.com/bio
- Mullen, Stanley (1911-1973) (stories)
- See www.sf-encyclopedia.com/entry/mullen_stanley
- Mumford, Ethel Watts [i.e., Ethel Watts Mumford Grant] (1873-1940) (stories)
- Playwright, poet, novelist. Born and died in New York City.
- Mumford, Manly S(tearns) (1898-1984) (stories)
- See www.mumford.cx/msm-bio.html
- Mundis, Jerrold (James) (1941- ) (stories)
- Living in New York City.
- Mundy, Talbot; pseudonym of William Lancaster Gribbon (1879-1940) (stories)
- See www.sf-encyclopedia.com/entry/mundy_talbot
- Munro, John (1928- ) (stories)
- Australian author.
- Munro, Neil (1864-1930) (stories)
- Born in Inveraray, Scotland; journalist in Glasgow.
- Murgia, Ivan (fl. 2010s) (art)
- See ivanmurgia.blogspot.co.uk
- Murphy, C(ornelius) A(nthony) (1898-1984) (art)
- See pulpartists.com/MurphyCA.html
- Murphy, Dennis Richard (1943-2008) (stories)
- See www.sarahweinman.com/confessions/2008/06/dennis-richard.html
- Murphy, H(enry) C(ruse, Jr.) (1886-1931) (art)
- See pulpartists.com/MurphyHC.html
- Murphy, Warren B(urton) (1933-2015) (stories) (assoc.)
- See www.sf-encyclopedia.com/entry/murphy_warren
- Murray, Donna Huston (1944- ) (stories) (assoc.)
- Living in Philadelphia.
- Murray, Max(well Alexander) (1900-1956) (stories)
- Born in Australia; newspaper reporter in that country, the U.S., and England; scriptwriter and editor for BBC during WWII. Married to Maysie Greig.
- Murray, Will(iam Patrick) (1953- ) (stories)
- See www.sf-encyclopedia.com/entry/murray_will
- Murtosaari, Jukka (1963- ) (art)
- See fi.wikipedia.org/wiki/Jukka_Murtosaari