- 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
- Ludlow, Fitz Hugh (1836-1870) (stories) (assoc.)
- See en.wikipedia.org/wiki/Fitz_Hugh_Ludlow
- Ludlow, Mike [i.e., Myron Ludlow III] (1921-2010) (art)
- See www.tuttartpitturasculturapoesiamusica.com/2012/11/Mike-Ludlow.html
- Ludlum, Robert (1927-2001) (stories) (assoc.)
- See en.wikipedia.org/wiki/Robert_Ludlum
- Ludlum, Stuart D. (1907-1991) (stories)
- Has also edited travel books.
- Ludovici, Albert, Jr. (1852-1932) (art)
- See www.markmitchellpaintings.com/blog/the-ludovici-family/
- Ludwig, Avram Noble (fl. 2010s) (stories)
- See www.avramnobleludwig.com
- Ludwig, Boris; pseudonym (stories)
- See www.sf-encyclopedia.com/entry/ludwig_boris
- Ludwig, Daniel K(eith) (1897-1992) (stories) (assoc.)
- See en.wikipedia.org/wiki/Daniel_K._Ludwig
- 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
- Luehrmann, Adele (fl. 1910s-1920s) (stories)
- Born in Memphis, Tennessee around 1878 and associated with the class of 1896, Vassar College; living n New York City in 1930.
- Lufbery, Gervais Raoul (1885-1918) (stories) (assoc.)
- See en.wikipedia.org/wiki/Gervais_Raoul_Lufbery
- Luft, C. J. (fl. 1960s) (stories)
- Possibly a pseudonym.
- Lugosi, Bela [i.e., Béla Ferenc Dezso Blaskó] (1882-1956) (stories) (assoc.)
- See en.wikipedia.org/wiki/Bela_Lugosi
- Luhrs, Natalie (fl. 2010s) (stories)
- See www.pretty-terrible.com
- Luigi, Belli; house pseudonym (stories)
- See www.sf-encyclopedia.com/entry/luigi_belli
- Luise zu Wied, Pauline Elisabeth Ottilie (1843-1916) (stories)
- See en.wikipedia.org/wiki/Elisabeth_of_Wied
- Luk-Oie, Ole; pseudonym of Ernest Dunlop Swinton (1868-1951) (stories)
- See www.sf-encyclopedia.com/entry/ole_luk-oie
- Lukavics, Amy (fl. 2010s) (stories)
- See www.amylukavics.com
- Luke, Frank (1897-1918) (stories) (assoc.)
- See en.wikipedia.org/wiki/Frank_Luke
- Luke, Tony (1966-2016) (art)
- See bearalley.blogspot.co.uk/2016/02/tony-luke-1966-2016.html
- Lukeman, Alex (1941- ) (stories)
- See alexlukeman.com
- Lukens, Helen (1872-1955) (stories)
- See www.findagrave.com/cgi-bin/fg.cgi?page=gr&GRid=101806136
- Lukin, Josh ({c}1969-2019) (stories) (assoc.)
- See liberalarts.temple.edu/academics/faculty/lukin-joshua
- Lukodianov, Isai (Borisovich) (1913-1984) (stories) (assoc.)
- See www.sf-encyclopedia.com/entry/lukodianov_isai
- Lukowich, Ed(ward) (1946- ) (stories)
- See en.wikipedia.org/wiki/Ed_Lukowich
- Lull, Roderick (Allyn) (1907-1966) (stories)
- Born in San Francisco; lived in Oregon.
- Lumley, Savile (1876-1960) (art)
- See bearalley.blogspot.com/2018/09/savile-lumley.html
- Lummis, Charles F(letcher) (1859-1928) (stories) (assoc.)
- Born in Lynn, Mass.; educated at Harvard University.
- Lumsden, James W. (fl. 1950s) (stories)
- Possibly Canadian.
- Lunan, Duncan (Alasdair) (1945- ) (stories) (assoc.)
- See www.sf-encyclopedia.com/entry/lunan_duncan
- Lund, T(rygve) (1886-?) (stories)
- Born in Norway; served in British Army in Boer War and then Royal Air Force; went to Canada and became member of Royal Northwest Mounted Police; at last sighting in 1935 was living in Ontario; death not traced.
- 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/
- Lundgren, Eric [i.e., Bertil Erik Karl Lundgren] (1906-1971) (art)
- See pulpartists.com/Lundgren.html
- Lundgren, Paul Arthur (1925-1981) (stories)
- Rare books dealer and author. Born in Kansas City, Missouri; died in Topeka, Kansas.
- 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
- Lungren, Fernand H(arvey) (1857-1932) (stories) (art)
- See en.wikipedia.org/wiki/Fernand_Lungren
- Lunn, Arnold (Henry Moore) (1888-1974) (stories)
- Born in Madras; educated at Harrow and Balliol.
- Lunn, Hugh Kingsmill (1889-1949) (stories)
- Born in London; educated at Harrow and Oxford.
- Lunt, (Samuel) Wilmot (1856-1939) (stories) (art) (assoc.)
- See www.artbiogs.co.uk/1/artists/lunt-wilmot
- Lupescu, Valya Dudycz (1974- ) (stories)
- See en.wikipedia.org/wiki/Valya_Dudycz_Lupescu
- Lupino, Ida (1918-1995) (stories)
- See en.wikipedia.org/wiki/Ida_Lupino
- Lupo, Dom (fl. 1940s-1950s) (art)
- Has also done illustrations for numerous childrens books and books on golf.
- Lupoff, Richard A(llen) (1935- ) (stories) (assoc.)
- See www.sf-encyclopedia.com/entry/lupoff_richard_a
- Lurgan, Lester; pseudonym of Mabel Winifred Knowles (1875-1949) (stories)
- See www.sf-encyclopedia.com/entry/lurgan_lester
- Luros, Milton [born Milton Louis Rosenblatt] (1911-1999) (art)
- See pulpartists.com/Luros.html
- Lusk, Hugh H(art) (1838-1926) (stories)
- Born in Carron Grove, Stirlingshire, Scotland; died in Auckland, New Zealand; wrote political and economic articles under his own name and serialized novels under the pseudonym.
- Lustbader, Eric Van (1946- ) (stories) (assoc.)
- See www.sf-encyclopedia.com/entry/lustbader_eric_van
- Luther, Lester (1921- ) (stories)
- Born in Milwaukee, Wisconsin. Not to be confused with Lester Luther (1888-1962).
- Luther, Mark Lee (1872-1951) (stories)
- Born in Knowlesville, N.Y.; educated at Harvard and Columbia University Law School; contributor to numerous magazines; magazine editor.
- Luttrell, Hank (fl. 1960s-2010s) (stories)
- See fancyclopedia.org/hank-luttrell
- Luttrell, Lesleigh (Couch) (fl. 1970s-2010s) (stories)
- See fancyclopedia.org/lesleigh-luttrell
- Lutz, Giles A(lfred) (1910-1982) (stories)
- See en.wikipedia.org/wiki/Giles_A._Lutz
- Lutz, Lisa (1970- ) (stories) (assoc.)
- See en.wikipedia.org/wiki/Lisa_Lutz
- Lützow, Count, Ph.D. [i.e., Franz Heinrich Hieronymus Valentin Graf von Lützow] (1849-1916) (stories)
- See en.wikipedia.org/wiki/Count_Francis_L%C3%BCtzow
- LuVisi, Dan ({c}1985- ) (stories) (art) (assoc.)
- See danluvisiart.deviantart.com
- Lux, Thomas (1946-2017) (stories) (assoc.)
- See www.poetryfoundation.org/poems-and-poets/poets/detail/thomas-lux
- Lyacos, Dimitris (1966- ) (stories) (assoc.)
- See en.wikipedia.org/wiki/Dimitris_Lyacos
- Lyakhovetsky, Roman (fl. 2010s) (stories)
- See romanly.livejournal.com
- Lyall, [Sir] Alfred C(omyn) (1835-1911) (stories) (assoc.)
- See en.wikipedia.org/wiki/Alfred_Comyn_Lyall
- Lyall, Francis (1940- ) (stories)
- Professor at Aberdeen University in Scotland.
- Lyall, Gavin (Tudor) (1932-2003) (stories)
- See bearalley.blogspot.co.uk/2009/09/gavin-lyall-cover-gallery.html
- Lybeck, Alvin H(iggins) (1919-2009) (stories)
- See www.wsclancy.com/obituary/Alvin-Higgins-Lybeck/Branford-CT/661167
- Lybeck, Ed(ward Arvid) [born Charles Edward Widegren] (1905-1965) (stories)
- Born in North Shields, UK, parents separated when he was a toddler, and he went to live with his grandparents in Sweden. At age 6, his mother came and brought him to her home in the USA. Adopted by his stepfather in October 1912. Earlier that year, his birth father had died in the sinking of the Titanic.
- 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
- Lydig, Rita [i.e., Mrs. Phillip Lydig, born Rita Hernandez de Alba de Acosta] (1875-1929) (stories)
- See en.wikipedia.org/wiki/Rita_de_Acosta_Lydig
- 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
- Lyle, D. P., M.D. (fl. 2000s-2010s) (stories) (assoc.)
- See www.dplylemd.com
- Lyle, Eugene P(ercy, Jr.) (1873-1962) (stories)
- See www.sf-encyclopedia.com/entry/lyle_eugene_p_jr
- 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, [Colonel] Arthur (Alfred) (1861-1934) (stories)
- See www.sf-encyclopedia.com/entry/lynch_colonel_arthur
- Lynch, (John Gilbert) Bohun (1884-1928) (stories) (assoc.)
- 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, J(ohn) Bernard (1898-?) (stories)
- Lived in Boston.
- 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
- Lynch, Patricia ({c}1894-1972) (stories)
- See en.wikipedia.org/wiki/Patricia_Lynch
- Lynch, Vincent (1862-1935) (art)
- Died in Brooklyn, New York.
- Lynch, William (1914- ) (stories) (assoc.)
- Writer. Born in Mudgee, New South Wales, Australia.
- Lynch-Harris, Ashley (fl. 2010s) (stories)
- See www.ashleylynchharris.com
- Lynd, Erik (fl. 2010s) (stories)
- See www.eriklynd.com
- Lynd, Robert (1879-1949) (stories) (assoc.)
- Born in Belfast; educated at Queens College, Belfast; journalist and newspaper news editor.
- Lynde, Francis (1856-1930) (stories) (assoc.)
- See www.sf-encyclopedia.com/entry/lynde_francis
- Lynds, Dennis (1924-2005) (stories) (assoc.)
- See www.sf-encyclopedia.com/entry/lynds_dennis
- Lynds, Gayle (Hallenbeck) (1950- ) (stories) (assoc.)
- Born in Omaha, Nebraska.
- Lyne, Felice (1887-1935) (stories) (assoc.)
- See forgottenoperasingers.blogspot.com/2015/08/felice-lyne-soprano-slater-missouri.html
- Lyne, Joseph Leycester (1837-1908) (stories) (assoc.)
- See en.wikipedia.org/wiki/Joseph_Leycester_Lyne
- Lynn, David H. (fl. 1990s-2000s) (stories)
- See www.kenyonreview.org/about-kr/masthead/david-h-lynn/