- Ludwig, Edward W(illiam) (1920-1990) (items) (chron.)
- See www.sf-encyclopedia.com/entry/ludwig_edward_w
- Ludwigsen, Will (fl. 2000s-2010s) (items) (chron.)
- See www.sf-encyclopedia.com/entry/ludwigsen_will
- Lugones (Argüello), Leopoldo (Antonio) (1874-1938) (items) (chron.)
- See en.wikipedia.org/wiki/Leopoldo_Lugones
- Luhrs, Natalie (fl. 2010s) (items) (chron.)
- See www.pretty-terrible.com
- Luhumyo, Idza (1993- ) (items) (chron.)
- See africanarguments.org/author/idza-luhumyo
- Luigi, Belli (fl. 1940s-1950s); house pseudonym (items) (chron.)
- See www.sf-encyclopedia.com/entry/luigi_belli
- luizishan (fl. 2020s) (items) (chron.)
- See stock.adobe.com/au/contributor/205816614/liuzishan
- Lukavics, Amy (fl. 2010s) (items) (chron.)
- See www.amylukavics.com
- Luke, Tony (1966-2016) (items) (chron.)
- See bearalley.blogspot.co.uk/2016/02/tony-luke-1966-2016.html
- Lukeman, Alex (1941- ); used pseudonym Alex Dain (items)
- See alexlukeman.com
- Lukens, Adam; pseudonym of Diane Detzer (1930-1992) (items)
- See www.sf-encyclopedia.com/entry/detzer_diane
- Lukin, Evgeny (1950- ) (items) (chron.); name also given as Evgeni Lukin and Yevgeny Lukin.
- See www.rusf.ru/lukin
- Lukin, Josh (1968-2019) (items) (chron.)
- See www.aqueductpress.com/authors/JoshLukin.php
- Lukowich, Ed(ward) (1946- ) (items) (chron.)
- See en.wikipedia.org/wiki/Ed_Lukowich
- Lumley, Brian (1937-2024) (items) (chron.)
- See en.wikipedia.org/wiki/Brian_Lumley
- Lumley, William (1880-1960) (items) (chron.)
- See lovecraft.fandom.com/wiki/William_Lumley
- Lunan, Duncan (Alasdair) (1945- ) (items) (chron.)
- See www.sf-encyclopedia.com/entry/lunan_duncan
- Lundberg, Jason Erik (fl. 2000s-2010s) (items) (chron.)
- See jasonlundberg.wordpress.com
- Lundblad, Henrik (fl. 2020s) (items) (chron.)
- See sketchrik.com
- Lundgren, Carl (1947- ) (items) (chron.)
- See en.wikipedia.org/wiki/Carl_Lundgren_(illustrator)
- Lundgren, Emily (fl. 2010s) (items) (chron.)
- See www.shimmerzine.com/authors/author-page-emily-lundgren/
- Lundoff, Catherine (fl. 1990s-2020s) (items) (chron.)
- See www.catherinelundoff.com
- Lundry, Don (?-2021) (items) (chron.)
- See file770.com/don-lundry-dies
- Lundwall, Sam J(errie) (1941- ) (items) (chron.)
- See www.sf-encyclopedia.com/entry/lundwall_sam_j
- Lupack, Barbara Tepa (1951- ) (items)
- See www.encyclopedia.com/arts/educational-magazines/lupack-barbara-tepa-1951
- Lupescu, Valya Dudycz (1974- ) (items) (chron.)
- See en.wikipedia.org/wiki/Valya_Dudycz_Lupescu
- Lupoff, Richard A(llen) (1935-2020) (items) (chron.)
- See www.sf-encyclopedia.com/entry/lupoff_richard_a
- Lurie, Alison (Stewart) (1926-2020) (items) (chron.)
- See en.wikipedia.org/wiki/Alison_Lurie
- Luros, Milton; [born Milton Louis Rosenblatt] (1911-1999) (items) (chron.)
- See pulpartists.com/Luros.html
- Lustbader, Eric Van (1946- ) (items)
- See www.sf-encyclopedia.com/entry/lustbader_eric_van
- Luttrell, Hank (fl. 1960s-2010s) (items) (chron.)
- See fancyclopedia.org/hank-luttrell
- Lutz, Giles A(lfred) (1910-1982) (items) (chron.)
- See en.wikipedia.org/wiki/Giles_A._Lutz
- Lutz, John (Thomas) (1939-2021) (items) (chron.)
- See en.wikipedia.org/wiki/John_Lutz_(mystery_writer)
- LuVisi, Dan (c1985- ) (items) (chron.)
- See danluvisiart.deviantart.com
- Lux, Zack (fl. 2010s-2020s) (items) (chron.)
- See zacklux.com
- Lyakhovetsky, Roman (fl. 2010s) (items) (chron.)
- See romanly.livejournal.com
- Lybeck, Alvin H(iggins) (1919-2009) (items) (chron.)
- See www.wsclancy.com/obituary/Alvin-Higgins-Lybeck/Branford-CT/661167
- Lybrand, Yewell (C., Jr.) (1930-1964) (items) (chron.)
- See johnlowman.blogspot.com/2005/09/space-magazine-line-up.html
- Lydersen, Dan (fl. 2010s) (items) (chron.)
- See www.danlydersen.com
- Lydon, Josie McNamara; [born Josephine McNamara] (1865-1948) (items) (chron.)
- See tellersofweirdtales.blogspot.co.uk/2014/04/josie-mcnamara-lydon-1865-1948.html
- Lyle, Anne (fl. 2010s) (items) (chron.)
- See www.annelyle.com
- Lyly, John (c1554-1606) (items) (chron.)
- See en.wikipedia.org/wiki/John_Lyly
- Lymington, John; pseudonym of John Newton Chance (1911-1983) (items)
- See www.sf-encyclopedia.com/entry/lymington_john
- Lynas, J(ohn) G. (fl. 2020s) (items) (chron.)
- See strangehorizons.com/author/john-lynas
- Lynch, (John Gilbert) Bohun (1884-1928) (items) (chron.)
- See www.sf-encyclopedia.com/entry/lynch_bohun
- Lynch, Chris (1962- ) (items) (chron.)
- See www.sf-encyclopedia.com/entry/lynch_chris
- Lynch, Donna (fl. 2000s-2020s) (items) (chron.)
- See www.goodreads.com/author/show/1269076.Donna_Lynch
- Lynch, H. Andrew (fl. 1980s-2010s) (items) (chron.)
- See www.goodreads.com/author/show/1295062.H_Andrew_Lynch
- Lynch, Kaitlyn (fl. 2020s) (items) (chron.)
- See kaitlynlynchcom.wordpress.com
- Lynch, Maggie McVay; [i.e., Marguerita McVay Lynch (fl. 2010s) (items) (chron.)
- See www.maggielynch.com
- Lynch, Mark Patrick (fl. 2000s-2020s) (items) (chron.)
- See www.markpatricklynch.blogspot.co.uk
- Lynch, Mike (1962- ) (items) (chron.)
- See mikelynchbooks.com
- Lynd, Erik (fl. 2010s) (items) (chron.)
- See www.eriklynd.com
- Lynds, Dennis (1924-2005) (items) (chron.)
- See www.sf-encyclopedia.com/entry/lynds_dennis
- Lynn, Elizabeth A(nne) (1946- ) (items) (chron.)
- See www.sf-encyclopedia.com/entry/lynn_elizabeth_a
- Lyon, (Mabel) Dana (1897-1982) (items) (chron.)
- Californian; born in Germany.
- Lyon, Hillary (fl. 1990s-2020s) (items) (chron.)
- See hillarylyon.wordpress.com
- Lyons, David (fl. 1970s-2010s) (items) (chron.)
- See www.davidlyonsauthor.com
- Lyons, Lynda (1949- ) (items) (chron.)
- See www.sf-encyclopedia.com/entry/lyons_lynda
- Lyons, Peter L(aurence) (fl. 1980s) (items) (chron.)
- Born in Adelaide, Australia.
- Lyons, Steve (fl. 1990s-2010s) (items) (chron.)
- See www.sf-encyclopedia.com/entry/lyons_steve
- Lyris, Sonia Orin (fl. 1980s-2020s) (items) (chron.)
- See en.wikipedia.org/wiki/Sonia_Orin_Lyris
- Lyster, Jonathan Sean (fl. 2000s-2020s) (items) (chron.)
- See jslyster.com
- Lyttleton, Raymond A(rthur) (1911-1995) (items)
- See en.wikipedia.org/wiki/Raymond_Lyttleton
- M., Kyoko (fl. 2010s) (items) (chron.)
- See shewhowritesmonsters.com/
- M., Leo Charles (fl. 2010s) (items) (chron.)
- See medium.com/@LeoCharlesM
- Maberry, Jonathan (1958- ) (items) (chron.)
- See en.wikipedia.org/wiki/Jonathan_Maberry