- Lozar, D. C. (fl. 2010s) (stories)
- See dclozar.com
- Lu, S. Qiouyi (fl. 2010s) (stories)
- See s.qiouyi.lu
- Luadthong, Tithi (fl. 2010s) (art)
- See tithi-luadthong.pixels.com
- Lubanko, Emily (fl. 2010s) (art)
- See www.emilylubanko.com
- Luberoff, William E(dward) (1910-2002) (art)
- See pulpartists.com/Luberoff.html
- Lucas, Christine (fl. 2000s-2010s) (stories)
- See www.christinlucas.com
- Lucas, Paul (fl. 1990s-2010s) (stories) (art)
- See en.wikifur.com/wiki/Paul_Lucas
- Lucas, Tim (1956- ) (stories)
- See en.wikipedia.org/wiki/Tim_Lucas
- Luceno, James (1947- ) (stories)
- See www.sf-encyclopedia.com/entry/luceno_james
- Luchs, Kurt (fl. 2010s) (stories)
- See kurtluchs.com
- Lucia, Kevin (fl. 2000s-2010s) (stories)
- See www.kevinlucia.com
- Lucian of Samosata ({c}115-190) (stories) (assoc.)
- See en.wikipedia.org/wiki/Lucian_of_Samosata
- Lucie-Smith, Edward (1933- ) (stories) (assoc.)
- See www.sf-encyclopedia.com/entry/lucie-smith_edward
- Luckett, Dave (1951- ) (stories) (assoc.)
- See en.wikipedia.org/wiki/Dave_Luckett
- Luckhurst, Roger (fl. 1990s-2010s) (stories) (assoc.)
- See en.wikipedia.org/wiki/Roger_Luckhurst
- Ludens, Adrian W. (fl. 2000s-2010s) (stories)
- See www.adrianludens.com
- Ludlam, Harry [born Herbert W. Ludlam] (1926-2011) (stories) (assoc.)
- See desturmobed.blogspot.com/2018/08/harry-ludlam.html
- Ludwig, Boris; pseudonym (stories)
- See www.sf-encyclopedia.com/entry/ludwig_boris
- Ludwig, Edward W(illiam) (1920-1990) (stories)
- See www.sf-encyclopedia.com/entry/ludwig_edward_w
- Ludwigsen, Will (fl. 2000s-2010s) (stories)
- See www.sf-encyclopedia.com/entry/ludwigsen_will
- Luhrs, Natalie (fl. 2010s) (stories)
- See www.pretty-terrible.com
- Luigi, Belli; house pseudonym (stories)
- See www.sf-encyclopedia.com/entry/luigi_belli
- Lukavics, Amy (fl. 2010s) (stories)
- See www.amylukavics.com
- Luke, Tony (1966-2016) (art)
- See bearalley.blogspot.co.uk/2016/02/tony-luke-1966-2016.html
- Lukeman, Alex (1941- ) (stories)
- See alexlukeman.com
- Lukin, Josh ({c}1969-2019) (stories)
- See liberalarts.temple.edu/academics/faculty/lukin-joshua
- Lukowich, Ed(ward) (1946- ) (stories)
- See en.wikipedia.org/wiki/Ed_Lukowich
- Lunan, Duncan (Alasdair) (1945- ) (stories) (assoc.)
- See www.sf-encyclopedia.com/entry/lunan_duncan
- Lundberg, Jason Erik (fl. 2000s-2010s) (stories)
- See jasonlundberg.wordpress.com
- Lundgren, Carl (1947- ) (art)
- See en.wikipedia.org/wiki/Carl_Lundgren_(illustrator)
- Lundgren, Emily (fl. 2010s) (stories)
- See www.shimmerzine.com/authors/author-page-emily-lundgren/
- Lundoff, Catherine (fl. 1990s-2010s) (stories)
- See www.catherinelundoff.com
- Lundwall, Sam J(errie) (1941- ) (stories) (assoc.)
- See www.sf-encyclopedia.com/entry/lundwall_sam_j
- Lupescu, Valya Dudycz (1974- ) (stories)
- See en.wikipedia.org/wiki/Valya_Dudycz_Lupescu
- Lupoff, Richard A(llen) (1935- ) (stories) (assoc.)
- See www.sf-encyclopedia.com/entry/lupoff_richard_a
- Luros, Milton [born Milton Louis Rosenblatt] (1911-1999) (art)
- See pulpartists.com/Luros.html
- Lustbader, Eric Van (1946- ) (stories) (assoc.)
- See www.sf-encyclopedia.com/entry/lustbader_eric_van
- Luttrell, Hank (fl. 1960s-2010s) (stories)
- See fancyclopedia.org/hank-luttrell
- Lutz, Giles A(lfred) (1910-1982) (stories)
- See en.wikipedia.org/wiki/Giles_A._Lutz
- LuVisi, Dan ({c}1985- ) (stories) (art) (assoc.)
- See danluvisiart.deviantart.com
- Lyakhovetsky, Roman (fl. 2010s) (stories)
- See romanly.livejournal.com
- Lybeck, Alvin H(iggins) (1919-2009) (stories)
- See www.wsclancy.com/obituary/Alvin-Higgins-Lybeck/Branford-CT/661167
- Lybrand, Yewell (C., Jr.) (1930-1964) (stories)
- See johnlowman.blogspot.com/2005/09/space-magazine-line-up.html
- Lydersen, Dan (fl. 2010s) (art)
- See www.danlydersen.com
- Lydon, Josie McNamara [born Josephine McNamara] (1865-1948) (stories)
- See tellersofweirdtales.blogspot.co.uk/2014/04/josie-mcnamara-lydon-1865-1948.html
- Lyle, Anne (fl. 2010s) (stories)
- See www.annelyle.com
- Lyly, John ({c}1554-1606) (stories)
- See en.wikipedia.org/wiki/John_Lyly
- Lymington, John; pseudonym of John Newton Chance (1911-1983) (stories) (assoc.)
- See www.sf-encyclopedia.com/entry/lymington_john
- Lynch, (John Gilbert) Bohun (1884-1928) (stories)
- See www.sf-encyclopedia.com/entry/lynch_bohun
- Lynch, Chris (1962- ) (stories)
- See www.sf-encyclopedia.com/entry/lynch_chris
- Lynch, Donna (fl. 2000s) (stories) (assoc.)
- See www.goodreads.com/author/show/1269076.Donna_Lynch
- Lynch, H. Andrew (fl. 1980s-2010s) (stories)
- See aflowerfell.andrewlynch.co.nz
- Lynch, Maggie McVay [i.e., Marguerita McVay Lynch (fl. 2010s) (stories)
- See www.maggielynch.com
- Lynch, Mark Patrick (fl. 2000s-2010s) (stories)
- See www.markpatricklynch.blogspot.co.uk
- Lynch, Mike (1962- ) (stories)
- See mikelynchbooks.com
- Lynd, Erik (fl. 2010s) (stories)
- See www.eriklynd.com
- Lynds, Dennis (1924-2005) (stories)
- See www.sf-encyclopedia.com/entry/lynds_dennis
- Lynn, Elizabeth A(nne) (1946- ) (stories) (assoc.)
- See www.sf-encyclopedia.com/entry/lynn_elizabeth_a
- Lyon, (Mabel) Dana (1897-1982) (stories)
- Californian; born in Germany.
- Lyon, Hillary (fl. 1990s-2010s) (stories)
- See hillarylyon.wordpress.com
- Lyons, David (fl. 1970s-2010s) (stories)
- See www.davidlyonsauthor.com
- Lyons, Lynda (1949- ) (stories)
- See www.sf-encyclopedia.com/entry/lyons_lynda
- Lyons, Peter L(aurence) (stories)
- Born in Adelaide, Australia.
- Lyons, Steve (fl. 1990s-2010s) (stories) (assoc.)
- See www.sf-encyclopedia.com/entry/lyons_steve
- Lyris, Sonia Orin (fl. 1980s-2010s) (stories)
- See en.wikipedia.org/wiki/Sonia_Orin_Lyris
- Lyttleton, Raymond A(rthur) (1911-1995) (stories) (assoc.)
- See en.wikipedia.org/wiki/Raymond_Lyttleton
- Maberry, Jonathan (1958- ) (stories) (assoc.)
- See en.wikipedia.org/wiki/Jonathan_Maberry
- MacAllister, Dean (fl. 2010s) (stories)
- See www.goodreads.com/author/show/6864554.Dean_MacAllister
- MacApp, C. C.; pseudonym of Carroll M. Capps (1913-1971) (stories) (assoc.)
- See www.sf-encyclopedia.com/entry/macapp_c_c
- Macardle, Dorothy (Marguerite Callan) (1889-1958) (stories) (assoc.)
- See en.wikipedia.org/wiki/Dorothy_Macardle
- MacArthur, Jodi (fl. 2000s-2010s) (stories)
- See www.jodimacarthur.blogspot.co.uk
- Macauley, Wayne (fl. 1990s-2010s) (stories)
- See waynemacauley.com
- MacAvoy, R(oberta) A(nn) (1949- ) (stories) (assoc.)
- See www.sf-encyclopedia.com/entry/macavoy_r_a
- MacBain-Stephens, Jennifer (fl. 2010s) (stories)
- See jennifermacbainstephens.wordpress.com
- MacBeth, George (Mann) (1932-1992) (stories)
- See www.sf-encyclopedia.com/entry/macbeth_george
- MacBride, Stuart (1969- ) (stories)
- See en.wikipedia.org/wiki/Stuart_MacBride
- MacCath, C(eallaigh) S. (fl. 2000s-2010s) (stories)
- See csmaccath.com
- MacClure, Victor; pseudonym of Thom MacWalter (1887-1963) (stories)
- See www.sf-encyclopedia.com/entry/macclure_victor
- MacCreagh, Gordon (1886-1953) (stories)
- See pulpflakes.blogspot.com/2012/08/gordon-maccreagh-adventurer-explorer.html
- MacDonald, George (1824-1905) (stories) (assoc.)
- See www.sf-encyclopedia.com/entry/macdonald_george
- Macdonald, James D(ouglas) (1954- ) (stories)
- See www.sf-encyclopedia.com/entry/macdonald_james_d
- MacDonald, John D(ann) (1916-1986) (stories) (assoc.)
- See en.wikipedia.org/wiki/John_D._MacDonald
- MacDonald, Leslyn (1904-1981) (stories)
- See tellersofweirdtales.blogspot.co.uk/2016/05/leslyn-macdonald-1904-1981.html
- MacDonald, Philip (1900-1980) (stories)
- See www.sf-encyclopedia.com/entry/macdonald_philip
- MacDougal, John; pseudonym of James Blish (1921-1975) & Robert A. W. Lowndes (1916-1998) (stories)
- See www.sf-encyclopedia.com/entry/macdougal_john
- MacDougall, Curtis Daniel (1903-1985) (stories) (assoc.)
- See en.wikipedia.org/wiki/Curtis_D._MacDougall
- Mace, David (Kendrew) (1951- ) (stories)
- See www.sf-encyclopedia.com/entry/mace_david
- MacFarlane, Alex Dally (fl. 2000s-2010s) (stories)
- See www.alexdallymacfarlane.com
- 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.
- 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
- Machan, Katharyn Howd (fl. 1990s-2010s) (stories)
- See faculty.ithaca.edu/machan
- 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
- Maciejewska, Joanna (fl. 2010s) (stories)
- See melfka.com
- MacIntyre, F(eargus) Gwynplaine (1949?-2010) (stories) (assoc.)
- See www.sf-encyclopedia.com/entry/macintyre_f_gwynplaine
- MacIsaac, Fred(erick John) (1886-1940) (stories)
- See www.sf-encyclopedia.com/entry/macisaac_fred
- Mack, David (Alan) (1969- ) (stories) (assoc.)
- See en.wikipedia.org/wiki/David_Alan_Mack