- Knox, John H. (1905-1983) (items) (chron.)
- Not animal scientist John Harvey Knox (1898-1979).
- Knox, Minnie Faegre (1886-1980) (items) (chron.)
- See tellersofweirdtales.blogspot.com/2011/11/minnie-faegre-knox-1886-1980.html
- Knudtsen, Ken (fl. 2010s) (items) (chron.)
- See kenknudtsen.blogspot.co.uk
- Koblas, John J. (1942-2013) (items) (chron.)
- See ericjames.org/wordpress/2013/03/12/obituary-john-j-jack-koblas
- Koboldt, Dan (fl. 2010s) (items) (chron.)
- See dankoboldt.com
- Koch, Aud (fl. 2010s) (items) (chron.)
- See audkoch.com
- Koch, Gini; [born Jeanne Marie Gerrard] (fl. 2010s) (items) (chron.)
- See en.wikipedia.org/wiki/Gini_Koch
- Koch, Joanna; former name of Joe Koch (fl. 2010s-2020s) (items) (chron.)
- See horrorsong.blog
- Koch, Joe (fl. 2010s-2020s); previously known as Joanna Koch (items) (chron.)
- See horrorsong.blog
- Kocher, Paul H(arold) (1907-1998) (items)
- See en.wikipedia.org/wiki/Paul_H._Kocher
- Koe, Tapanga (fl. 2010s) (items) (chron.)
- See www.asymmetryfiction.com/author/tapangakoe/
- Koelle, Spencer (B.) (fl. 2000s-2020s) (items) (chron.)
- See sites.google.com/site/spencerbkoelle/
- Koen, Viktor (fl. 1990s-2010s) (items) (chron.)
- See www.viktorkoen.com
- Koenig, Walter (1936- ) (items)
- See www.sf-encyclopedia.com/entry/koenig_walter
- Koertge, Ron (1940- ) (items) (chron.)
- See en.wikipedia.org/wiki/Ron_Koertge
- Koestler, Arthur (1905-1983) (items)
- See www.sf-encyclopedia.com/entry/koestler_arthur
- Kofoed, Karl B(eckwith) (1942- ) (items) (chron.)
- See www.sf-encyclopedia.com/entry/kofoed_karl
- Koger, Grove (fl. 2010s-2020s) (items) (chron.)
- See worldenoughblog.wordpress.com
- Kohagen, Axel (fl. 2010s) (items) (chron.)
- See axelkohagen.com
- Kohl, Brianne (M.) (fl. 2010s) (items) (chron.)
- See briannekohl.com
- Köhler, Kathrin (fl. 2010s) (items) (chron.)
- See theliteratecondition.wordpress.com
- Kohler, Vincent (DePaul) (1948-2002) (items) (chron.)
- Reporter in Oregon.
- Köhler, Wolfgang (1887-1967) (items)
- See en.wikipedia.org/wiki/Wolfgang_Köhler
- Kohn, Arnold (Lupu) (1920-1984) (items) (chron.)
- See pulpartists.com/Kohn.html
- Kohn, Marek (fl. 2010s) (items) (chron.)
- See en.wikipedia.org/wiki/Marek_Kohn
- Kokernot, Sarah (fl. 2010s) (items) (chron.)
- See sarahkokernot.com
- Kolakowski, Nick (fl. 2010s-2020s) (items) (chron.)
- See nickkolakowski.com
- Kolar, Rachel (fl. 2010s) (items) (chron.)
- See www.rachelkolar.com
- Kole, Mica Scotti (fl. 2010s-2020s) (items) (chron.)
- See micascottikole.com
- Kole, Nick (fl. 2000s) (items) (chron.)
- See nicholaskole.blogspot.co.uk
- Kollef, Hannah (fl. 2010s) (items) (chron.)
- See www.goodreads.com/author/show/5751169.Hannah_Kollef
- Kolodji, Deborah P. (1959-2024) (items) (chron.)
- See www.deborahpkolodji.com
- Koltyrina, Lia (fl. 2010s) (items) (chron.)
- See kriscole.deviantart.com
- Koman, Victor (1954- ) (items) (chron.)
- See www.sf-encyclopedia.com/entry/koman_victor
- Komar, Leah (fl. 2010s-2020s) (items) (chron.)
- See slipperyelm.findlay.edu/authors/2016-2/leah-komar
- Komatsu, Sakyo; [i.e., Minoru “Sakyo” Komatsu] (1931-2011) (items) (chron.)
- See en.wikipedia.org/wiki/Sakyo_Komatsu
- Komoff, Tammy (D.) (fl. 2020s) (items) (chron.)
- See tammykomoff.com
- Komor, Zoltán (1986- ) (items) (chron.)
- See theneweryork.com/authors/zoltan-komor
- Kondo, Yoji (1933-2017); used pseudonym Eric Kotani (items) (chron.)
- See www.sf-encyclopedia.com/entry/kotani_eric
- Koner, Brenda L.; pseudonym (fl. 1930s) (items) (chron.)
- used by a Yale Record writer/staffer for Real Spicy Horror Tales.
- Konior, Irek (fl. 2010s) (items) (chron.)
- See www.apex-magazine.com/tag/irek-konior
- Kono, Tensei (1935-2012) (items) (chron.)
- See en.wikipedia.org/wiki/Tensei_Kono
- Konot, Sean (Michael) (1969- ) (items) (chron.)
- See www.comics.org/creator/12021
- Konrath, Jon (fl. 2010s) (items) (chron.)
- See rumored.com
- Koo, Crystal Gail Shangkuan (fl. 2000s-2010s) (items) (chron.)
- See cgskoo.wordpress.com
- Kooistra, Jeffery D. (1959- ) (items) (chron.)
- See www.sf-encyclopedia.com/entry/kooistra_jeffrey_d
- Koontz, Dean R(ay) (1945- ) (items) (chron.)
- See en.wikipedia.org/wiki/Dean_R._Koontz
- Kopas, Merritt (fl. 2010s) (items) (chron.)
- See en.wikipedia.org/wiki/Merritt_Kopas
- Kopaska-Merkel, David C. (1957- ); previously known as David C. Merkel (items) (chron.)
- See dreamsandnightmaresmagazine.blogspot.co.uk
- Koras, Binny (c1895-?) (items) (chron.)
- See tellersofweirdtales.blogspot.co.uk/2017/04/binny-koras-gypsy-poet-ca-1895.html
- Korn, Michael F(rederick) (1958- ) (items) (chron.)
- See www.sf-encyclopedia.com/entry/korn_m_f
- Kornacki, Christine (fl. 2020s) (items) (chron.)
- See www.christinekornacki.com
- Kornbluth, C. M.; [i.e., Cyril Kornbluth] (1923-1958); used pseudonyms Gabriel Barclay, Arthur Cooke, S. D. Gottesman, Cyril Judd, Scott Mariner & Ivar Towers (items) (chron.)
- See www.sf-encyclopedia.com/entry/kornbluth_c_m
- Körner, S(tephan) (1913-2000) (items)
- See en.wikipedia.org/wiki/Stephan_Körner
- Kornoelje, Clifford (1912-2001); used pseudonym Jack Darrow (items) (chron.)
- See fancyclopedia.wikidot.com/jack-darrow
- Koroglu, Yigit (fl. 2010s-2020s) (items) (chron.)
- See www.yigitkoroglu.com
- Korogodski, Leonid (fl. 2010s-2020s) (items)
- See www.pinknoise.net
- Korpa, J. R.; [i.e., Javier Rodríguez Corpa] (1974- ) (items) (chron.)
- See jr-korpa.com
- Korsgaard, Sean C. W. (fl. 2020s) (items) (chron.)
- See www.korsgaardscommentary.com
- Korshak, Erle Melvin (1923-2021) (items) (chron.)
- See locusmag.com/2021/08/erle-korshak-1923-2021
- Kosko, Bart (Andrew) (1960- ) (items)
- See www.sf-encyclopedia.com/entry/kosko_bart
- Kossin, Sanford (1926- ) (items) (chron.)
- See www.macarthurmemorial.org/m_m_sanford.asp
- Kostanski, Steven (fl. 2010s) (items)
- See www.imdb.com/name/nm2725627
- Kostelanetz, Richard (Cory) (1940- ) (items) (chron.)
- See en.wikipedia.org/wiki/Richard_Kostelanetz
- Koster, Dana (fl. 2000s-2010s) (items) (chron.)
- See danakoster.com
- Koster, Pieter Paul (1945- ) (items) (chron.)
- Son of Pieter Paul Koster.
- Kostova, Elizabeth; [née Johnson] (1964- ) (items)
- See en.wikipedia.org/wiki/Elizabeth_Kostova