- Macdougall, Arthur R., Jr. (1896-1983) (stories)
- See maineanencyclopedia.com/macdougall-arthur-r-jr/
- MacDougall, Curtis Daniel (1903-1985) (stories) (assoc.)
- See en.wikipedia.org/wiki/Curtis_D._MacDougall
- MacDougall, (Samuel) Michael Mickey (1902-1996) (stories)
- See geniimagazine.com/wiki/index.php?title=Michael_MacDougall
- MacDowell, (Willet) Melbourne (1856-1941) (stories)
- See en.wikipedia.org/wiki/Melbourne_MacDowell
- Mace, David (Kendrew) (1951- ) (stories)
- See www.sf-encyclopedia.com/entry/mace_david
- Macfadden, Bernarr (1868-1955) (stories) (assoc.)
- See www.sf-encyclopedia.com/entry/macfadden_bernarr
- MacFadyen, Virginia [i.e., Virginia Hendon MacFadyen Hall] (1900-1966) (stories)
- See www.sf-encyclopedia.com/entry/macfadyen_virginia
- Macfall, (Chambers) Haldane (Cooke) (1860-1928) (stories) (assoc.)
- Born in India, son of a British army officer; educated at Sandhurst Military Academy and joined West Indies Regiment in 1885; retired 1890 to write; died in London.
- Macfarlan, James (1832-1862) (stories) (assoc.)
- See en.wikipedia.org/wiki/James_Macfarlan
- MacFarlane, Alex Dally (fl. 2000s-2010s) (stories)
- See www.alexdallymacfarlane.com
- Macfarlane, Annie Robertson (1851-1933) (stories)
- See w3.stu.ca/stu/sites/nble/l/logan_annie_robertson.html
- Macfarlane, Charles (1799-1858) (stories)
- See en.wikipedia.org/wiki/Charles_Macfarlane
- MacFarlane, J(ohn Fleming Cullen) (1857-1936) (stories) (art)
- See bearalley.blogspot.co.uk/2018/04/j-macfarlane.html
- MacFarlane, Peter Clark (1871-1924) (stories)
- Born in St. Clair County, Missouri; died in San Francisco, California; was a railway clerk, then actor in Los Angeles, then a minister in Kansas City, then came to San Francisco as a successful author; despondent over failing health, he shot himself on the steps of the San Francisco morgue.
- Macfarlane, Willie (1890-1961) (stories)
- See en.wikipedia.org/wiki/Willie_Macfarlane
- Macfie, Ronald Campbell (1867-1931) (stories)
- See en.wikipedia.org/wiki/Ronald_Campbell_Macfie
- MacGill, Patrick (1891-1963) (stories)
- Born in Ireland; poet and author of fiction and nonfiction.
- MacGilvary, N(orwood) H(odge) (1874-1949) (art)
- See www.edanhughes.com/biography.cfm?ArtistID=938
- MacGowan, Alice (L.) (1858-1947) (stories)
- Born in Perrysburg, Ohio; died in Los Gatos, California. Sister of Grace MacGowan Cooke.
- Macgowan, Kenneth (1888-1963) (stories)
- See en.wikipedia.org/wiki/Kenneth_Macgowan
- MacGrath, Harold (1871-1932) (stories)
- Born in Syracuse, New York; prolific author, traveler and sportsman.
- MacGregor, Ellen (1906-1954) (stories) (assoc.)
- See www.sf-encyclopedia.com/entry/macgregor_ellen
- MacGregor, Ken (fl. 2010s) (stories)
- See ken-macgregor.com
- MacGregor, Loren J. (1950- ) (stories) (assoc.)
- See www.sf-encyclopedia.com/entry/macgregor_loren_j
- MacGregor, Mary [i.e., Mary MacGregor Jameson] (1889-1973) (stories)
- Wife of Malcolm Jameson.
- MacGregor, Susan (fl. 1990s-2010s) (stories)
- See suzenyms.blogspot.ca
- Machado, Carmen Maria (1986- ) (stories) (assoc.)
- See carmenmariamachado.com
- Machamer, (Thomas) Jefferson (1900-1960) (stories) (art)
- See en.wikipedia.org/wiki/Jefferson_Machamer
- Machan, Katharyn Howd (fl. 1990s-2010s) (stories)
- See faculty.ithaca.edu/machan
- Machar, Agnes Maule (1837-1927) (stories)
- See en.wikipedia.org/wiki/Agnes_Maule_Machar
- MacHarg, William B(riggs) (1872-1951) (stories)
- See www.sf-encyclopedia.com/entry/macharg_william
- Machen, Arthur; pseudonym of Arthur Llewellyn Jones (1863-1947) (stories) (assoc.)
- See en.wikipedia.org/wiki/Arthur_Machen
- Machiavelli, Niccolò (1469-1527) (stories)
- See en.wikipedia.org/wiki/Niccol%C3%B2_Machiavelli
- Machlin, Milt(on Robert) (1924-2004) (stories) (art)
- Author, editor of Argosy magazine, reporter. Born in New York City.
- Machray, Robert (1857-1946) (stories)
- Born in Scotland; educated in England and Canada; author and journalist. Family emigrated to Canada in his early childhood, but he was educated at Cambridge; ordained in 1883, then taught English at University of Manitoba until marriage in 1886; took up ministry briefly, but returned to England and became editor of the Daily Mail.
- Maciejewska, Joanna (fl. 2010s) (stories)
- See melfka.com
- MacIlwaine, Herbert C(harles) ({c}1859-1916) (stories)
- Born in Ireland; died in London.
- MacInnes, Hamish [born Hamish McInnes] (1930- ) (stories)
- See en.wikipedia.org/wiki/Hamish_MacInnes
- MacIntyre, Carlyle F(erren) (1890-1967) (stories)
- See en.wikipedia.org/wiki/Carlyle_Ferren_MacIntyre
- MacIntyre, F(eargus) Gwynplaine (1949?-2010) (stories) (assoc.)
- See www.sf-encyclopedia.com/entry/macintyre_f_gwynplaine
- MacIsaac, Fred(erick John) (1886-1940) (stories) (assoc.)
- See www.sf-encyclopedia.com/entry/macisaac_fred
- Mack, Connie [i.e., Cornelius McGillicuddy, Sr.] (1862-1956) (stories) (assoc.)
- See en.wikipedia.org/wiki/Connie_Mack
- Mack, David (Alan) (1969- ) (stories) (assoc.)
- See en.wikipedia.org/wiki/David_Alan_Mack
- Mack, Louise [i.e., Mary Louise Mack Leyland] (1874-1935) (stories)
- Born in Tasmania; journalist in Sydney and London; war correspondent during WWI.
- 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.
- Mackail, Denis (George) (1892-1971) (stories) (assoc.)
- Born in Kensington; educated at Oxford.
- Mackall, Dandi Daley (fl. 2010s) (stories)
- See en.wikipedia.org/wiki/Dandi_Daley_Mackall
- Mackall, Lawton (1888-1968) (stories)
- Author, editor, lecturer, and gastronome; he was the translator of this story. Born in Chesnut Hill, Pennsylvania; died in West New Brighton, Staten Island, New York.
- Mackay, Charles (1814-1889) (stories)
- See en.wikipedia.org/wiki/Charles_Mackay_(author)
- MacKay, Colin (fl. 1900s-1910s) (stories)
- Writer; not to be confused with Colin MacKay (1936- ). Born in Shelburne, Nova Scotia, Canada.
- Mackay, (george) Eric (1851-1898) (stories) (assoc.)
- See en.wikipedia.org/wiki/Eric_Mackay
- Mackay, Lewis Hugh (1897-1963) (stories)
- Born in Bengal, India. Husband of Barbara James.
- MacKay, William (1846-?) (stories)
- Born in Belfast, Ireland; a journalist in London.
- Mackay, William A(ndrew) (1876-1939) (art)
- See en.wikipedia.org/wiki/William_Mackay
- Mackaye, Christy [i.e., Christina Mackaye] (1909-2002) (stories)
- See steiner.presswarehouse.com/books/AuthorDetail.aspx?id=23967
- MacKaye, David L(oring) (1890-1972) (stories)
- Writer, librarian; director of San Jose, California, Adult Education Center. Born in Brooklyn, New York.
- MacKaye, Harold Steele (1866-1928) (stories)
- See www.sf-encyclopedia.com/entry/mackaye_harold_steele
- Mackellar, (Isobel Marion) Dorothea (1885-1986) (stories)
- See www.dorotheamackellar.com.au/about.html
- MacKellar, William (1914-1994) (stories)
- See articles.courant.com/1994-07-12/news/9407120244_1_books-italy-and-france-northeast-children-s-literature-collections
- Mackelworth, R(onald) W(alter) (1930- ) (stories)
- See www.sf-encyclopedia.com/entry/mackelworth_r_w
- Macken, Walter (1916-1967) (stories) (assoc.)
- Born in Galway, Ireland; actor, dramatist and novelist.
- Mackennal, [Sir] (Edgar) B(ertram) (1863-1931) (art)
- See en.wikipedia.org/wiki/Bertram_Mackennal
- Mackenzie, Ashley (fl. 2010s) (stories) (art) (assoc.)
- See ashmackenzie.com
- Mackenzie, [Sir] (Anthony Edward Montagu) Compton (1883-1972) (stories) (assoc.)
- See en.wikipedia.org/wiki/Compton_Mackenzie
- Mackenzie, (Sir) Morell (1837-1892) (stories) (assoc.)
- See en.wikipedia.org/wiki/Morell_Mackenzie
- Mackenzie, (Alexander MacKay) Scobie (1906-1988) (stories)
- Educated in New Zealand; became a lawyer in London; also wrote musicals for the London stage.
- Mackenzie, Thomas (1853-1930) (stories)
- See en.wikipedia.org/wiki/Thomas_Mackenzie
- MacKenzie, W(illiam) A(ndrew) (1870-1942) (stories)
- Born in Invergordon, Scotland.
- Mackenzie, [Sir] William (1849-1923) (stories) (assoc.)
- See en.wikipedia.org/wiki/William_Mackenzie_(railway_entrepreneur)
- Mackersey, Ian (1925- ) (stories)
- Former journalist and head of film and television production at British Airways in London; biographer and film maker in New Zealand.
- Mackey, Nathaniel (1947- ) (stories)
- See en.wikipedia.org/wiki/Nathaniel_Mackey
- Mackie, John (1862-1939) (stories)
- Born in Stirlingshire; lived in Australia and then Canada, where he joined the Mounties; served in the Boer War.
- Mackie, Philip (1918-1985) (stories)
- See www.sf-encyclopedia.com/entry/mackie_philip
- Mackin, Edward (fl. 1950s-1960s) (stories) (assoc.)
- See en.wikipedia.org/wiki/Edward_Mackin
- MacKinlay, (Malcolm) Sterling (1876-1952) (stories)
- See www.sf-encyclopedia.com/entry/mackinlay_sterling
- MacKinnon, Allan (1912-1980) (stories)
- Screenwriter with the U.K. film industry 1939-1956. Lived for some years in Canada and died in Montreal.
- MacKinnon, [Sir] Frank (Douglas) (1871-1946) (stories)
- See en.wikipedia.org/wiki/Frank_Douglas_MacKinnon
- 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/
- Mackland, Ray (1911- ) (stories)
- Newspaperman, writer. Born in Council Bluffs, Iowa; lived in Washington, D.C.
- Mackler, Carolyn (1973- ) (stories)
- See en.wikipedia.org/wiki/Carolyn_Mackler
- Macklin, T(homas) Eyre (1867-1943) (stories) (art)
- See en.wikipedia.org/wiki/Thomas_Eyre_Macklin
- Mackworth, Margaret (Haig), 2nd Viscountess Rhondda (1883-1958) (stories)
- See en.wikipedia.org/wiki/Margaret_Mackworth,_2nd_Viscountess_Rhondda
- MacLafferty, James Henry (1871-1937) (stories)
- See en.wikipedia.org/wiki/James_H._MacLafferty
- MacLaren, A(rchibald) C(ampbell) (1871-1944) (stories) (assoc.)
- See en.wikipedia.org/wiki/Archie_MacLaren
- MacLaverty, Bernard (1942- ) (stories)
- See en.wikipedia.org/wiki/Bernard_MacLaverty
- MacLean, Alistair (Stuart) (1922-1987) (stories) (assoc.)
- See en.wikipedia.org/wiki/Alistair_MacLean
- MacLean, C(harles) A(gnew) (1880-1928) (stories)
- See pulpflakes.blogspot.co.uk/2015/05/charles-agnew-mclean-editor-of-popular.html
- MacLean, (Charles) Douglas (1890-1967) (stories) (assoc.)
- See en.wikipedia.org/wiki/Douglas_MacLean
- Maclean, [Sir] Fitzroy Hew (Royle, 1st Baronet) (1911-1996) (stories)
- See en.wikipedia.org/wiki/Sir_Fitzroy_Maclean,_1st_Baronet
- MacLean, George E(dwin) (1850-1938) (stories)
- See en.wikipedia.org/wiki/George_Edwin_MacLean