- McCollum, Rick (fl. 1980s-2020s) (items) (chron.)
- See www.rickmccollum.com
- McComas, J(esse) Francis (1911-1978) (items) (chron.)
- See www.sf-encyclopedia.com/entry/mccomas_j_francis
- McCombs, Theodore (fl. 2010s-2020s) (items) (chron.)
- See www.beneath-ceaseless-skies.com/authors/theodore-mccombs
- McConnell, James E(dwin) (1903-1995) (items) (chron.)
- See en.wikipedia.org/wiki/James_E._McConnell
- McConnell, James V. (1925-1990) (items) (chron.)
- See www.sf-encyclopedia.com/entry/mcconnell_james_v
- McCord, Joseph (1880-1943) (items) (chron.)
- Born in Moline, Illinois.
- McCormac, Philip (fl. 2000s) (items) (chron.)
- See www.goodreads.com/author/show/977831.Philip_McCormac
- McCormack, Patrick (1958- ) (items)
- See www.patrickmccormack.com
- McCormack, Una (fl. 2000s-2020s) (items) (chron.)
- See www.sf-encyclopedia.com/entry/mccormack_una
- McCormack, W(illiam) J(ohn) (1947- ) (items)
- See en.wikipedia.org/wiki/Hugh_Maxton
- McCormick, James Austin (fl. 2000s-2020s) (items) (chron.)
- See jimbostories.wordpress.com
- McCormick, William Burton (fl. 2010s-2020s) (items) (chron.)
- See www.goodreads.com/author/show/5447401.William_Burton_McCormick
- McCosh, Emily (fl. 2010s) (items) (chron.)
- See www.oceansinthesky.com
- McCoy, Chanté (fl. 2010s) (items) (chron.)
- See chantemccoy.com
- McCoy, Max (1958- ) (items)
- See www.sf-encyclopedia.com/entry/mccoy_max
- McCoy, R. Scott (fl. 2000s-2010s) (items) (chron.)
- See www.rscottmccoy.com
- McCoy, Sylvester; [born Percy James Patrick Kent-Smith] (1943- ) (items)
- See en.wikipedia.org/wiki/Sylvester_McCoy
- McCoy, Tod (fl. 2010s) (items) (chron.)
- See todmccoy.com
- McCrady, Kelly (fl. 2010s) (items) (chron.)
- See www.kellymccrady.com
- McCranie, Tex (fl. 2010s) (items) (chron.)
- See texmccranie.deviantart.com
- McCrea, [Sir] W(illiam) H(unter) (1904-1999) (items)
- See en.wikipedia.org/wiki/William_McCrea_(astronomer)
- MacCreagh, Gordon (1886-1953) (items) (chron.)
- See pulpflakes.blogspot.com/2012/08/gordon-maccreagh-adventurer-explorer.html
- McCrorie, Edward (1936- ) (items)
- See en.wikipedia.org/wiki/Edward_McCrorie
- McCrumb, Sharyn (Elaine Atwood) (1948- ) (items)
- See www.sf-encyclopedia.com/entry/mccrumb_sharyn
- McCullough, Kelly (David) (fl. 1990s-2010s) (items) (chron.)
- See www.sf-encyclopedia.com/entry/mccullough_kelly
- McCullough, Laura (M.) (1960- ) (items) (chron.)
- See en.wikipedia.org/wiki/Laura_McCullough
- McCutchen, D. K. (fl. 2010s) (items) (chron.)
- See blogs.umass.edu/dkmcc2
- McDaniel, David (Edward) (1939-1977) (items) (chron.)
- See www.sf-encyclopedia.com/entry/mcdaniel_david
- McDaniel, Kent (fl. 1960s-2010s) (items) (chron.)
- See dumbfoundingstories.com
- McDaris, Catfish (1953- ) (items) (chron.)
- See theliteraryunderground.org/wiki/index.php?title=Catfish_McDaris
- McDermott, J(oe) M. (fl. 2000s-2020s) (items) (chron.)
- See jmmcdermott.wordpress.com
- McDermott, Kirstyn (1973- ) (items) (chron.)
- See en.wikipedia.org/wiki/Kirstyn_McDermott
- McDermott, Kristen (fl. 2000s) (items) (chron.)
- See www.cmich.edu/colleges/chsbs/English/FacultyandStaff/Pages/Kristen-McDermott.aspx
- McDevitt, Jack; [i.e., John Charles McDevitt] (1935- ) (items) (chron.)
- See www.sf-encyclopedia.com/entry/mcdevitt_jack
- macDhai(-Anthony), Rillan (1959- ) (items) (chron.)
- See www.fanfiction.net/u/2320008/macDhai
- MacDonald, Angus (1959- ) (items) (chron.)
- See people.well.com/user/angus
- McDonald, Ed (fl. 2010s) (items) (chron.)
- See edmcdonaldwriting.com
- MacDonald, George (1824-1905) (items) (chron.)
- See www.sf-encyclopedia.com/entry/macdonald_george
- Macdonald, Helen (1970- ) (items)
- See en.wikipedia.org/wiki/Helen_Macdonald_(writer)
- McDonald, Ian (Neil) (1960- ) (items) (chron.)
- See www.sf-encyclopedia.com/entry/mcdonald_ian
- Macdonald, James D(ouglas) (1954- ) (items) (chron.)
- See www.sf-encyclopedia.com/entry/macdonald_james_d
- MacDonald, John D(ann) (1916-1986) (items) (chron.)
- See en.wikipedia.org/wiki/John_D._MacDonald
- MacDonald, Leslyn (1904-1981); also known as Leslyn Mocabee (items) (chron.)
- See tellersofweirdtales.blogspot.co.uk/2016/05/leslyn-macdonald-1904-1981.html
- MacDonald, Philip (1900-1980) (items) (chron.)
- See www.sf-encyclopedia.com/entry/macdonald_philip
- McDonald, Sandra (1966- ) (items) (chron.)
- See www.sf-encyclopedia.com/entry/mcdonald_sandra
- McDonald, Siobhan (fl. 2010s-2020s) (items) (chron.)
- See www.siobhanmcdonald.com
- McDonald, Steven Edward (1956- ) (items) (chron.)
- See www.sf-encyclopedia.com/entry/mcdonald_steven_e
- MacDonald, Wayne (1951-2024); used pseudonym Taral Wayne (items) (chron.)
- See en.wikipedia.org/wiki/Taral_Wayne
- McDonell, M. Luke (fl. 2010s-2020s) (items) (chron.)
- See mlukemcdonell.wordpress.com
- McDonnell, Carole (fl. 2000s-2010s) (items) (chron.)
- See carolemcdonnell.blogspot.co.uk
- McDonough, Thomas R(edmond) (1945- ) (items) (chron.)
- See www.sf-encyclopedia.com/entry/mcdonough_thomas_r
- McDougal, Heather (fl. 2000s-2020s) (items) (chron.)
- See www.heathermcdougal.com
- MacDougal, John; pseudonym of James Blish & Robert A. W. Lowndes (fl. 1940s) (items) (chron.)
- See www.sf-encyclopedia.com/entry/macdougal_john
- MacDougall, Curtis Daniel (1903-1985) (items)
- See en.wikipedia.org/wiki/Curtis_D._MacDougall
- McDougall, Sophia (1979- ) (items) (chron.)
- See en.wikipedia.org/wiki/Sophia_McDougall
- McDowell, (Robert) Emmett (1914-1975) (items) (chron.)
- See desturmobed.blogspot.co.uk/2011/12/robert-emmett-mcdowell.html
- Mace, David (Kendrew) (1951- ) (items) (chron.)
- See www.sf-encyclopedia.com/entry/mace_david
- Mcean, Junior (fl. 2000s) (items) (chron.)
- See sites.google.com/a/newmyths.com/nmwebsite/contributors/junior-mcean
- McElroy, Soraya Jean-Louis (fl. 2010s) (items) (chron.)
- See strangehorizons.com/non-fiction/articles/artist-interview-soraya-jean-louis-mcelroy
- McEnroe, Richard S(ean) (1956- ) (items) (chron.)
- See www.sf-encyclopedia.com/entry/mcenroe_richard_s
- MacEoin, Denis (1949-2022); used pseudonyms Jonathan Aycliffe & Daniel Easterman (items) (chron.)
- See en.wikipedia.org/wiki/Denis_MacEoin
- McEvoy, Seth (1948- ) (items) (chron.)
- See www.sf-encyclopedia.com/entry/mcevoy_seth
- McEwan, Ian (Russell) (1948- ) (items) (chron.)
- See www.sf-encyclopedia.com/entry/mcewan_ian
- MacEwen, Gwendolyn (Margaret) (1941-1987) (items) (chron.)
- See en.wikipedia.org/wiki/Gwendolyn_MacEwen
- Macfadden, Bernarr (1868-1955) (items)
- See www.sf-encyclopedia.com/entry/macfadden_bernarr
- McFadden, Bunny (fl. 2020s) (items) (chron.)
- See www.docbunny.com
- McFadden, Dennis (fl. 2010s-2020s) (items) (chron.)
- See ordinarypeopleextraordinarylives.edublogs.org/dennis-mcfadden