- McGillivray, Erica (fl. 2010s) (items) (chron.)
- See uncannymagazine.com/authors/erica-mcgillivray
- McGillivray, Ray (fl. 1920s-1940s) (items) (chron.)
- Traveller and sportsman. Lived in Citronelle, Alabama.
- McGinnis, Erika (fl. 2000s-2010s) (items) (chron.)
- See www.erikamcginnisart.com
- McGivern, William P(eter) (1922-1982); used pseudonyms Alexander Blade, P. F. Costello & Gerald Vance (items) (chron.)
- See www.sf-encyclopedia.com/entry/mcgivern_william_p
- McGivney, Timothy (fl. 2010s) (items) (chron.)
- See timothymcgivney.com
- McGoran, Jon(athan) (fl. 2010s-2020s) (items) (chron.)
- See www.jonmcgoran.com
- McGowan, David C. (fl. 1940s) (items) (chron.)
- possibly a pseudonym.
- McGowan, Jennifer A. (fl. 2010s) (items) (chron.)
- See www.jenniferamcgowan.com
- McGowan, Kieran (fl. 2010s) (items) (chron.)
- See snidefield.deviantart.com
- McGrath, Martin (fl. 2000s-2010s) (items) (chron.)
- See www.mmcgrath.co.uk
- McGrath, Patrick (M.) (1950- ) (items) (chron.)
- See en.wikipedia.org/wiki/Patrick_McGrath_(novelist)
- McGraw, Charles G. (fl. 1980s-2000s) (items) (chron.)
- See www.sf-encyclopedia.com/entry/mcgraw_charles_g
- McGreevy, Justine (fl. 2010s) (items) (chron.)
- See sites.google.com/a/newmyths.com/nmwebsite/contributors/justine-mcgreevy
- MacGregor, Ellen (1906-1954) (items)
- See www.sf-encyclopedia.com/entry/macgregor_ellen
- MacGregor, Ken (fl. 2010s-2020s) (items) (chron.)
- See www.goodreads.com/kenmacgregor
- MacGregor, Loren J. (1950- ) (items) (chron.)
- See www.sf-encyclopedia.com/entry/macgregor_loren_j
- MacGregor, Mary; [i.e., Mary MacGregor Jameson] (1889-1973) (items) (chron.)
- Wife of Malcolm Jameson.
- McGregor, Rafe (1973- ) (items) (chron.)
- See philpapers.org/profile/32092
- MacGregor, Susan (fl. 1990s-2020s) (items) (chron.)
- See suzenyms.blogspot.ca
- McGrew, Donald Francis (1886-1955) (items) (chron.)
- See pulpflakes.blogspot.com/2019/07/donald-francis-mcgrew-author-journalist.html
- MacGriogair, M. Evan (fl. 2010s-2020s) (items) (chron.)
- See memacgriogair.com
- McGugan, Libby (1972- ) (items) (chron.)
- See libbymcgugan.com
- McGuire, John J(oseph) (1917-1981) (items) (chron.)
- See www.sf-encyclopedia.com/entry/mcguire_john_j
- McGuire, Patrick L(lewellyn) (1949- ) (items) (chron.)
- See www.sf-encyclopedia.com/entry/mcguire_patrick_l
- Machado, Carmen Maria (1986- ) (items) (chron.)
- See carmenmariamachado.com
- Machado de Assis, Joaquim Maria (1839-1908) (items) (chron.)
- See en.wikipedia.org/wiki/Machado_de_Assis
- Machan, Katharyn Howd (fl. 1990s-2020s) (items) (chron.)
- See faculty.ithaca.edu/machan
- MacHarg, William B(riggs) (1872-1951) (items) (chron.)
- See www.sf-encyclopedia.com/entry/macharg_william
- Machen, Arthur; [working name of Arthur Llewellyn Jones] (1863-1947) (items) (chron.)
- See en.wikipedia.org/wiki/Arthur_Machen
- McHugh, Ian (fl. 2000s-2010s) (items) (chron.)
- See en.wikipedia.org/wiki/Ian_McHugh
- McHugh, Jessica (1982- ) (items) (chron.)
- See en.wikipedia.org/wiki/Jessica_McHugh
- Mac Hugh, Lily (fl. 2020s) (items) (chron.)
- See www.lilymachugh.com
- McHugh, Maura (fl. 2000s-2020s) (items) (chron.)
- See splinister.com
- McHugh, Maureen F. (1959- ) (items) (chron.)
- See www.sf-encyclopedia.com/entry/mchugh_maureen_f
- McHugh, Vincent (1904-1983) (items)
- See desturmobed.blogspot.com/2019/01/vincent-mchugh.html
- Macía, Cristina (1965- ) (items) (chron.)
- See nineworlds.co.uk/guest/cristina-macía.html
- Maciejewska, Joanna (fl. 2010s) (items) (chron.)
- See melfka.com
- McIlveen, John M. (fl. 1990s-2010s) (items) (chron.)
- See johnmcilveen.com
- McInnes, Graham (Campbell) (1912-1970) (items)
- See www.sf-encyclopedia.com/entry/mcinnes_graham
- MacInnes, Martin (1983- ) (items)
- See en.wikipedia.org/wiki/Martin_MacInnes
- McIntosh, J. T.; pseudonym of James Murdoch MacGregor (1925-2008) (items) (chron.)
- See www.sf-encyclopedia.com/entry/mcintosh_j_t
- McIntosh, Kenneth (Chafee) (1883-1965) (items) (chron.)
- Navy officer; born in Washington DC; died in New Orleans 4/7/1965.
- McIntosh, Will (fl. 2000s-2020s) (items) (chron.)
- See willmcintosh.net
- MacIntyre, F(eargus) Gwynplaine (1949?-2010) (items) (chron.)
- See www.sf-encyclopedia.com/entry/macintyre_f_gwynplaine
- McIntyre, Iain (fl. 1980s-2020s) (items)
- See en.wikipedia.org/wiki/Iain_McIntyre
- McIntyre, T. J. (fl. 2000s-2010s) (items) (chron.)
- See southernweirdo.wordpress.com
- McIntyre, Vonda N(eel) (1948-2019) (items) (chron.)
- See www.sf-encyclopedia.com/entry/mcintyre_vonda_n
- MacIsaac, Fred(erick John) (1882-1940) (items) (chron.)
- See www.sf-encyclopedia.com/entry/macisaac_fred
- McIvor, Katie (fl. 2020s) (items) (chron.)
- See katiemcivor.com
- Mack, David (Alan) (1969- ) (items) (chron.)
- See en.wikipedia.org/wiki/David_Alan_Mack
- Mack, S. M. (fl. 2010s) (items) (chron.)
- See whatsmacksaid.com
- Mack, Thomas (Daniel) (1891-?) (items) (chron.)
- Born in Rochester, New York; author and salesman; death not traced.
- McKain, Janelle (fl. 2010s) (items) (chron.)
- See janellemckain.deviantart.com
- Mackay, Charles (1814-1889) (items) (chron.)
- See en.wikipedia.org/wiki/Charles_Mackay_(author)
- McKay, Emily; [born Emily McKaskle] (fl. 2010s-2020s) (items)
- See www.fantasticfiction.com/m/emily-mckay
- Mackay, Lewis Hugh (1897-1963) (items)
- Born in Bengal, India. Husband of Barbara James.
- McKeag, Ernest L(ionel) (1896-1976) (items) (chron.)
- See bearalley.blogspot.co.uk/2006/08/ernest-mckeag_17.html
- McKee, David (John) (1935-2022) (items) (chron.)
- See en.wikipedia.org/wiki/David_McKee
- McKee, Erin (fl. 1970s-2010s) (items) (chron.)
- See www.valleycon.com/emckee.html
- McKee, Jo (fl. 2010s) (items) (chron.)
- See www.jomckee.com
- McKee, (Edward) Lucky (1975- ) (items) (chron.)
- See en.wikipedia.org/wiki/Lucky_McKee
- Mackelworth, R(onald) W(alter) (1930- ) (items) (chron.)
- See www.sf-encyclopedia.com/entry/mackelworth_r_w
- McKenna, Edward L(awrence) (1893-1953) (items) (chron.)
- Author, columnist, assistant professor of insurance at the University of Pennsylvania. Born in Brooklyn, New York; died in Baltimore, Pennsylvania.
- McKenna, Juliet E. (1965- ) (items) (chron.)
- See www.julietemckenna.com
- McKenna, Lesley (fl. 2010s) (items) (chron.)
- See www.beds.ac.uk/howtoapply/departments/culture-and-communications/staff/lesley-mckenna
- McKenna, Marti (fl. 1990s-2010s) (items) (chron.)
- See www.martimckenna.com
- McKenna, Martin (1969-2020) (items) (chron.)
- See johnnyalucard.com/2020/11/01/martin-mckenna-1969-2020