- Kloutsou, Marilena ({c}1991- ) (stories) (assoc.)
- See frozenmistress.deviantart.com
- Kneale, (Thomas) Nigel (1922-2006) (stories)
- See en.wikipedia.org/wiki/Nigel_Kneale
- Kneen, Orville H(ayter) (1889-1964) (stories)
- American aviator.
- Knickmeyer, Steve (1944- ) (stories)
- See fr.wikipedia.org/wiki/Steve_Knickmeyer
- Knight, Bernard (1931- ) (stories)
- Barrister and doctor.
- Knight, Clifford (Reynolds) (1886-1963) (stories)
- Novelist, journalist, writer. Born in Fulton, Kansas; educated in Kansas and at U. of Mich.; newspaper editor in Kansas City, free-lance writer in California; contributed short stories to numerous magazines.
- Knight, Damon (Francis) (1922-2002) (stories)
- See www.sf-encyclopedia.com/entry/knight_damon
- Knight, Eric (Mowbray) (1897-1943) (stories) (assoc.)
- See en.wikipedia.org/wiki/Eric_Knight
- Knight, Kathleen Moore (1890-1984) (stories)
- See www.sf-encyclopedia.com/entry/knight_kathleen_moore
- Knight, Leonard A(lfred) (1895-1977) (stories)
- Born in East Preston, England; died in Haverford, West Dyford, Wales.
- Knightly, Robert (fl. 2000s-2010s) (stories)
- See robertknightly.blogspot.co.uk
- Knighton, Tony (fl. 2010s) (stories)
- See www.tonyknighton.com
- Knoles, William (Henley) (1926-1972) (stories)
- See efanzines.com/EK/eI7/index.htm
- Knopf, Chris (1951- ) (stories)
- See www.chrisknopfmystery.com/
- Knotts, Raymond (1889-1968) (stories)
- Born in Illinois; newspaper editor and columnist in Chicago.
- Knox, Bill [i.e., William Knox] (1928-1999) (stories)
- See en.wikipedia.org/wiki/Bill_Knox
- Knox, John H. (1905-1983) (stories)
- Not animal scientist John Harvey Knox (1898-1979).
- Knox, [Monsignor] Ronald A(rbuthnott) (1888-1957) (stories) (assoc.)
- See www.sf-encyclopedia.com/entry/knox_ronald_a
- Koe, Tapanga (fl. 2010s) (stories)
- See www.asymmetryfiction.com/author/tapangakoe/
- Koefod, Susan (fl. 2010s) (stories)
- See susankoefod.com
- Koelzer, Jay (fl. 2010s) (art)
- See www.illustrationsource.com/stock/artist/jay-koelzer
- Koenig, Joseph L. (1946- ) (stories)
- Reporter for true crime periodicals; living in New York City.
- Kofoed, Jack [i.e., John Christian Kofoed] (1894-1979) (stories)
- Journalist, editor, and writer. Born in Philadelphia, Pennsylvania; died in Miami, Florida.
- Kofoed, William H. (fl. 1910s-1970s) (stories)
- Journalist who lived in Miami, Florida.
- Kohler, Sheila (May) (1941- ) (stories)
- See en.wikipedia.org/wiki/Sheila_Kohler
- Kohlhuber, Robert (fl. 2010s) (art)
- See www.kohlhuber.net
- Kohn, Arnold (Lupu) (1920-1984) (art)
- See pulpartists.com/Kohn.html
- Kolakowski, Nick (fl. 2010s) (stories)
- See nickkolakowski.com
- Komroff, Manuel (1890-1974) (stories)
- See en.wikipedia.org/wiki/Manuel_Komroff
- Koontz, Dean R(ay) (1945- ) (stories) (assoc.)
- See en.wikipedia.org/wiki/Dean_R._Koontz
- Koreto, R(ichard) J. (fl. 2010s) (stories)
- See ladyfrancesffolkes.com
- Korn, Michael F(rederick) (1958- ) (stories)
- See www.sf-encyclopedia.com/entry/korn_m_f
- Kornbluth, C. M. [i.e., Cyril Kornbluth] (1923-1958) (stories)
- See www.sf-encyclopedia.com/entry/kornbluth_c_m
- Kostoff, Lynn (B.) (1954- ) (stories)
- Professor of English at Francis Marion College; living in South Carolina.
- Krajnak, Mark (fl. 2010s) (stories)
- See jerseystylephotography.wordpress.com
- Kramer, Edgar Daniel (1887-1966) (stories)
- Perhaps from Philadelphia.
- Kramer, Frank (1909-1993) (art)
- See pulpartists.com/Kramer.html
- Krauzer, Steven M(ark) (1948-2009) (stories)
- See www.sf-encyclopedia.com/entry/krauzer_steven_m
- Krolicki, Neil (1976- ) (stories)
- See www.neilkrolicki.com
- Kroll, Harry Harrison (1888-1967) (stories) (assoc.)
- Lived as a child in Dyersburg, Tennessee, and teens and young adult in Alabama; school teacher in Alabama though without formal education, then obtained degrees from Peabody College for Teachers in Nashville; taught English composition and literature at University of Tennessee and Lincoln Memorial University; published over 900 pieces of short fiction and essays and 27 novels.
- Kroneman, Olaf (fl. 2010s) (stories)
- See olafkroneman.com
- Krupa, Julian S. (1913-1989) (art)
- See sticklersworld.blogspot.co.uk/2006/03/julian-krupa-man-legend.html
- Kubilius, Walter (1918-1993) (stories)
- See www.sf-encyclopedia.com/entry/kubilius_walter
- Kuhlhoff, Pete [i.e., Elbert Herman Kuhlhoff] (1903-1972) (art)
- See pulpartists.com/Kuhlhoff.html
- Kull, George F(rederick?) (1911-1963) (stories)
- Born in Buffalo, New York; died in Riverside, California.
- Kummer, Frederic Arnold (Sr.) (1873-1943) (stories) (assoc.)
- Born in Catonsville, Maryland; educated at Renssaeler Polytechnic Institute; civil engineer, amateur artist, novelist and playwright; contributed to all major magazines; died in Baltimore, Maryland.
- Kurland, Michael J(oseph) (1938- ) (stories)
- See www.sf-encyclopedia.com/entry/kurland_michael
- Kurtz, Ed (fl. 2010s) (stories)
- See edkurtz.net
- Kussi, Peter (?-2012) (stories)
- See en.wikipedia.org/wiki/Peter_Kussi
- Kuttner, Henry (1915-1958) (stories)
- See www.sf-encyclopedia.com/entry/kuttner_henry
- Kuzneski, Chris (D.) (1969- ) (stories) (assoc.)
- See en.wikipedia.org/wiki/Chris_Kuzneski
- Kyle, David A(ckerman) (1919-2016) (stories)
- See www.sf-encyclopedia.com/entry/kyle_david_a
- Kyne, Peter B(ernard) (1880-1957) (stories)
- See www.sf-encyclopedia.com/entry/kyne_peter_b
- La Due, Hubert (William) (1891-1946) (stories)
- See tellersofweirdtales.blogspot.co.uk/2014/11/hubert-la-due-1891-1946.html
- La Farge, Christopher (Grant) (1897-1956) (stories)
- See en.wikipedia.org/wiki/Christopher_La_Farge_(author)
- La Tray, Chris (fl. 2010s) (stories)
- See chrislatray.com
- Lachman, Marvin (fl. 1960s-2010s) (stories)
- See www.poisonedpenpress.com/marvin-lachman/
- Läckberg, Camilla [i.e., Jean Edith Camilla Läckberg Eriksson] (1974- ) (stories) (assoc.)
- See en.wikipedia.org/wiki/Camilla_L%C3%A4ckberg
- LaCorte, Ellen (fl. 2010s) (stories)
- See ellenlacorte.com
- LaCossitt, Henry (1901-1962) (stories)
- Editor, radio commentator. Born in Shreveport, Louisiana; died in Hannibal, Missouri.
- Lafferty, R(aphael) A(loysius) (1914-2002) (stories)
- See www.sf-encyclopedia.com/entry/lafferty_r_a
- Laflin, Jack (Carlock) (1922-2012) (stories)
- Born in Brooklyn; graduated cum laude from Princeton University; television sports editor; traveled widely.
- Laing, Alexander (Kinnan) (1903-1976) (stories)
- See www.sf-encyclopedia.com/entry/laing_alexander
- Lait, Jack [i.e., Jacquin Leonard Lait] (1881-1954) (stories)
- Birth name probably Jacob Lait. Born in New York City; died in Beverly Hills, California; reporter, editor and executive with Hearst newspapers for more than 50 years.
- Lampton, Chris(topher F.) (1950- ) (stories)
- See www.sf-encyclopedia.com/entry/lampton_chris
- Lancet, Barry (fl. 2010s) (stories) (assoc.)
- See barrylancet.com/barry.php
- Land, Jon (1957- ) (stories) (assoc.)
- See www.sf-encyclopedia.com/entry/land_jon
- Landers, Clifford E. (fl. 1980s-2010s) (stories)
- See wordswithoutborders.org/contributor/clifford-e.-landers
- Landis, Geoffrey A(lan) (1955- ) (stories)
- See www.sf-encyclopedia.com/entry/landis_geoffrey_a
- Landon, Herman (A.) (1882-1960) (stories) (assoc.)
- Born in Stockholm; came to the U.S. ca.1895; died in New York City; feature writer and managing editor for the Washington Herald; pulp writer.
- Landru, Henri (Désiré) (1869-1922) (stories) (assoc.)
- See en.wikipedia.org/wiki/Henri_D%C3%A9sir%C3%A9_Landru
- Lane, Andy [i.e., Andrew Lane] (1963- ) (stories)
- See www.sf-encyclopedia.com/entry/lane_andy
- Lane, Fred (fl. 1940s-1950s) (stories)
- Not the expert on Venice and economic history Frederic Chapin Lane (1900-1984).
- Lane, Jeremy (1893-1963) (stories)
- See www.sf-encyclopedia.com/entry/lane_jeremy
- Lane, Kenneth Westmacott (1893-1954) (stories)
- Educated at Rugby and Oxford; a journalist.
- Lanford, Mickey [i.e., M. A. Lanford] (fl. 1970s-1980s) (stories)
- Retired registered physical therapist in Texas.
- Lang, Allen Kim (1928- ) (stories)
- See www.sf-encyclopedia.com/entry/lang_allen_kim
- Lang, [Rev.] Gordon (1893-1981) (stories)
- See en.wikipedia.org/wiki/Gordon_Lang
- Lang, Preston (fl. 2010s) (stories)
- See www.prestonlangbooks.com
- Langelaan, George (1908-1972) (stories)
- See www.sf-encyclopedia.com/entry/langelaan_george
- Langella, Frank (A., Jr.) (1938- ) (stories) (assoc.)
- See en.wikipedia.org/wiki/Frank_Langella
- Langille, Cody (fl. 2000s-2010s) (stories)
- See www.crlangille.com
- Lankford, Terrill (Lee) (1959- ) (stories) (assoc.)
- Hollywood screenwriter.
- Lansing, Carol (fl. 1920s) (stories)
- possibly a pseudonym.
- Lantigua, John (1947- ) (stories)
- Born in New York City; free-lance journalist living in Bangkok.
- Lardner, Ring(gold) W(ilmer) (1885-1933) (stories)
- See en.wikipedia.org/wiki/Ring_Lardner
- Lariar, Lawrence [born Lawrence Rosenblum] (1908-1981) (stories)
- Author, editor, cartoonist. Born in Brooklyn, New York; changed his name between 1929 and 1935.
- Larsen, Christian A. (fl. 2010s) (stories) (assoc.)
- See exlibrislarsen.com
- Larson, Ellen (1953- ) (stories)
- See www.sf-encyclopedia.com/entry/larson_ellen
- Larson, Marvin (Claire) (1925-2013) (stories)
- Born and died in Minneapolis, Minnesota; graduate in English from the University of Minnesota; technical writer for various companies (including Honeywell), and freelance writer of short stories and articles on fishing and hunting.
- Laskowski, Tara (fl. 2010s) (stories)
- See taralaskowski.com
- Lasser, David (1902-1996) (stories)
- See www.sf-encyclopedia.com/entry/lasser_david
- Latham, John H(oward) (1917-2001) (stories)
- See new.losttreasure.com/Home/AboutUs
- Latimer, John (1937- ) (stories) (assoc.)
- See www.sf-encyclopedia.com/entry/latimer_john
- Latsis, Mary Jane (1927-1997) (stories)
- A lawyer.
- Lauden, S. W. (fl. 2010s) (stories)
- See badcitizencorporation.com
- Laukkanen, Owen (fl. 2010s) (stories) (assoc.)
- See owenlaukkanen.com
- Laurence, John; pseudonym of John Laurence Pritchard (1885-1968) (stories)
- See www.sf-encyclopedia.com/entry/laurence_john
- Lauriston, Victor [born William Edward Park] (1881-1973) (stories)
- Born in Fletcher, Ontario.