- Isely, Reymoure Keith (fl. 1950s-1970s) (stories)
- Broadcasting executive and radio actor turned farmer in Canada.
- Jackson, Charles Tenney (1874-{c}1950) (stories)
- Journalist and novelist. Born in St. Louis, Missouri; lived in Miami, Florida.
- Jackson, Frederick (John) (1886-1953) (stories)
- Playwright, novelist, producer for stage, screen and television. Born in Pittsburgh, Pennsyvania; died in Hollywood, California.
- Jackson, Margaret Weymouth (1895-1974) (stories)
- See indianajournalismhof.org/1996/01/margaret-weymouth-jackson
- Jacobi, Carl (Richard) (1908-1997) (stories)
- See www.sf-encyclopedia.com/entry/jacobi_carl
- Jakes, John (William) (1932- ) (stories) (assoc.)
- See www.sf-encyclopedia.com/entry/jakes_john
- James, Frederic; pseudonym of Robert Greenleaf Athearn (1914-1983) (stories)
- Historian and writer. Born in Kremlin, Montana; lives in Colorado.
- James, G(eorge) P(ayne) R(ainsford, Esq.) (1799-1860) (stories)
- Born in London; prolific novelist; spent much time in France; the popularity of his writing was destroyed by a savage parody of his work by Thackeray in Punch in 1847; appointed consul to Massachusetts in 1850 and became a literary celebrity there; appointed consul-general of the Austrian ports in the Adriatic in 1856.
- James, Laurence (William) (1942-2000) (stories)
- See www.sf-encyclopedia.com/entry/james_laurence
- James, Will(iam Roderick) [born Joseph Ernest Nephtali Dufault] (1892-1942) (stories) (art)
- See en.wikipedia.org/wiki/Will_James_(artist)
- Janes, J(erry) George (1902-1999) (art)
- See pulpartists.com/Janes.html
- Jarvis, E. K.; house pseudonym (fl. 1940s-1950s) (stories)
- See www.sf-encyclopedia.com/entry/jarvis_e_k
- Jenkins, Charles C(hristopher) (1882-1943) (stories)
- See tellersofweirdtales.blogspot.co.uk/2014/04/charles-christopher-jenkins-1882-1943.html
- Jenkins, Will(iam) F(itzgerald) (1896-1975) (stories)
- Prolific author in all fields of writing, though today remembered only for his science fiction done under the name Murray Leinster. Born in Norfolk, Virginia; died in Gloucester, Virginia.
- Jenney, Robert (Ludke) (1914-2000) (art)
- See pulpartists.com/Jenney.html
- Jennings, Al(phonso J.) (1863-1961) (stories)
- See en.wikipedia.org/wiki/Al_Jennings
- Joffe, Robert Maxwell (1908-1971) (stories)
- See en.wikipedia.org/wiki/Robert_Maxwell_(producer)
- Johns, Bruce (fl. 1920s-1930s) (stories)
- Journalist. Born in the northwestern United States; lived in California.
- Johns, Talbot (1909-1969) (stories)
- See tellersofweirdtales.blogspot.com/2013/11/talbot-johns-1909-1969.html
- Johnson, W(alter) Ryerson (1901-1995) (stories)
- Prolific pulp writer; author of juvenile books; editor; also one of the original users of the pseudonym Kenneth Robeson. Born in Divernon, Illinois; died in Florida.
- Johnston, Gerald R. (1901-1978) (stories)
- Retired as an AF colonel in 1947, having served in public relations during much of his wartime service.
- Johnston, Terry (C.) (1947-2001) (stories) (assoc.)
- See en.wikipedia.org/wiki/Terry_C._Johnston
- Johnston, Velda [i.e., Velda Johnston Heslop] (1912-1997) (stories)
- See en.wikipedia.org/wiki/Velda_Johnston
- Jones, Charles Campbell (1887-1926?) (stories)
- Writer, poet, paralyzed from the waist down as the result of a train accident in Yuma, Arizona. Born in Hannibal, Missouri; if this is the paralyzed writer described by Harold Hersey in Pulpwood Editor (1937), he commited suicide.
- Jones, Frank Goewey (1874-?) (stories)
- Muskegon, Michigan businessman convicted and imprisoned for embezzlement; pardoned in 1915. Born in Chicago, Illinois.
- Jones, Grace (Ethel) (1884-1977) (stories)
- See desturmobed.blogspot.co.uk/2011/12/bassett-morgan.html
- Jones, Lloid (1908- ) (stories)
- Teacher, writer of books for young readers.
- Jones, Neil R(onald) (1909-1988) (stories)
- See www.sf-encyclopedia.com/entry/jones_neil_r
- Jones, Robert Gibson (1889-1969) (art)
- See pulpartists.com/Jones.html
- Jonson, Ben (1572-1637) (stories)
- See en.wikipedia.org/wiki/Ben_Jonson
- Jordan, J(ames) A. (fl. 1930s-1950s) (stories)
- See bearalley.blogspot.co.uk/2009/12/j-jordan.html
- Joscelyn, Archie (Lynn) (1899-1986) (stories)
- See helenair.com/lifestyles/western-wonder/article_db7b9bfc-313d-56d9-8776-d503d679b9b6.html
- Joseph, John (fl. 1920s-1930s) (stories)
- Traveller and writer. Born in Iowa; lived in Idaho.
- Josselyn, Talbert (1885?-1961) (stories)
- Widely-published author of magazine sports stories. Served with the Office of War Information in San Francisco during WWII, died in Carmel, CA.
- Judd, Cameron (1956- ) (stories)
- Managing editor of Greenville, Tennessee, newspaper.
- Kalez, Jay J. (1895-1982) (stories)
- Writer. Born in Spokane, Washington.
- Kastel, Warren; house pseudonym (fl. 1940s-1950s) (stories)
- See www.sf-encyclopedia.com/entry/kastel_warren
- Kastle, Herbert D(avid) (1924-1987) (stories)
- See lynn-munroe-books.com/list59/herbertkastle.htm
- Kauffman, Reginald Wright (1877-1959) (stories)
- Born and mostly lived in Lancaster, Pa.; graduate of Harvard; editor of Bangor, Maine, newspaper in 1940s.
- Kaufman, Stephen (1947- ) (stories)
- See www.sf-encyclopedia.com/entry/river_uncle
- Kauten, Mat(hias) (1911-1977) (art)
- See pulpartists.com/Kauten.html
- Kayser, Ronal (1905-1988) (stories)
- Writer and journalist. Born in the midwestern United States; lived in La Jolla, California.
- Keaton, David James (fl. 2000s-2010s) (stories)
- See davidjameskeaton.com
- Keats, John (1795-1821) (stories)
- See en.wikipedia.org/wiki/John_Keats
- Keefer, Ralph Delamere (1883-1912) (stories)
- From England, enlisted in the Canadian Royal Northwest Mounted Police, and led an adventurous life. He died in the Adirondacks of New York, and these stories were discovered among his possessions by his friend Chalmers, who rewrote them and sold them as posthumous collaborations.
- Keeler, Harry Stephen (1889-1967) (stories)
- See www.sf-encyclopedia.com/entry/keeler_harry_stephen
- Keen, Mary [i.e., Marie Keen Gress] (1914-2001) (stories)
- See www.cowgirl.net/portfolios/marie-keen-gress
- Keene, Day; pseudonym of Gunard Hjertstedt (1904-1969) (stories)
- See www.sf-encyclopedia.com/entry/keene_day
- Keevil, Henry John (1914-1978) (stories)
- See bearalley.blogspot.co.uk/2013/07/henry-john-keevill.html
- Keller, H(arry) A. (1894-1973?) (stories)
- Born in Philadelphia. Editor of mystery and detective story magazines.
- Keller, (Charles) Reamer (1905-1994) (stories)
- See en.wikipedia.org/wiki/Reamer_Keller
- Kelley, Thomas P(atrick) (1905-1982) (stories)
- See www.sf-encyclopedia.com/entry/kelley_thomas_p
- Kelliher, Dan T. (1910-1995) (stories)
- Newspaper reporter and feature writer in Kansas City.
- Kelly, Fred C(harters) (1882-1959) (stories)
- See en.wikipedia.org/wiki/Fred_C._Kelly
- Kemp, H(arold) S(tuart) M(iller) (1892-?) (stories)
- Writer. Born in England, lived in Canada.
- Kemp, Harry (Hibbard) (1883-1960) (stories)
- Poet and writer. Born in Youngstown, Ohio; died in Provincetown, Massachusetts.
- Kepfield, Sam S. (fl. 2000s-2010s) (stories)
- See www.smashwords.com/profile/view/samkepfield
- Kerigan, Florence (1896-1984) (stories)
- See www.sf-encyclopedia.com/entry/kerigan_florence
- Kerkhoff, Eleanor [Mrs. Johnston D. Kerkhoff; born Eleanor Hogue Stinchcomb] ({c}1897-1940) (stories)
- From New York. Lived in Baldwin.
- Kermit, Lance; house pseudonym (fl. 1940s-1960s) (stories)
- A house pseudonym of Popular Publications, used by at least fifteen people in as many different magazines. Alden Norton wrote two pieces; it is possible that Roy Ald is responsible for the remaining piece.
- Kerr, Alvah Milton (1858-1924) (stories)
- See www.sf-encyclopedia.com/entry/kerr_alvah_milton
- Ketchum, Philip (L.) (1902-1969) (stories) (assoc.)
- Born and educated in Colorado; in social work for 10 years before turning to writing and moving to California.
- Kiefer, W(illiam) Ralph (1905-1934) (art)
- See pulpartists.com/KieferWR.html
- Kiemle, Henry W(illiam, Jr.) (1908-1969) (stories) (art)
- See pulpartists.com/Kiemle.html
- Killmer, C. J. (fl. 2010s) (stories)
- See cjkillmer.com
- King, Carolyn St. Clair (1892-{c}1967) (stories)
- See eadsrv.denverlibrary.org/sdx/pl/doc-tdm.xsp?id=WH203_d0e33&fmt=text&base=fa
- Kingery, Don(ald) (1924-2014) (stories)
- See www.sterlingfuneralhome.com/tributes/Donald-Kingery
- Kingsley, Charles (1819-1875) (stories)
- See en.wikipedia.org/wiki/Charles_Kingsley
- Kinstler, Everett Raymond (1926-2019) (stories) (art)
- See pulpartists.com/Kinstler.html
- Kipling, (Joseph) Rudyard (1865-1936) (stories)
- See en.wikipedia.org/wiki/Rudyard_Kipling
- Kirchner, Harry (1912-1988) (art)
- See pulpartists.com/Kirchner.html
- Kjelgaard, Jim [i.e., James Arthur Kjelgaard] (1910-1959) (stories) (assoc.)
- See www.sf-encyclopedia.com/entry/kjelgaard_jim
- Kline, Hibberd V(an) B(uren) (1885-1959) (art)
- Born in Auriesville, New York.
- Kneen, Orville H(ayter) (1889-1964) (stories)
- American aviator.
- Knibbs, Henry Herbert (1874-1945) (stories)
- Poet and novelist. Born in Clifton, Ontario; died in La Jolla, California.
- 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, Sam (fl. 2010s) (stories) (art)
- See samknight.com
- Knox, John H. (1905-1983) (stories)
- Not animal scientist John Harvey Knox (1898-1979).
- 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, Lloyd A. (fl. 1920s-1930s) (stories)
- From Kansas.
- Kohn, Arnold (Lupu) (1920-1984) (art)
- See pulpartists.com/Kohn.html
- 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
- Krepps, Robert W(ilson) (1919-1980) (stories)
- See www.sf-encyclopedia.com/entry/krepps_robert_w
- Krieg, Vaughn [i.e., Vaughn Krieg Huskey] (1904-1976) (stories)
- See www.cowgirl.net/portfolios/vaughn-krieg-huskey
- Kroll, Harry Harrison (1888-1967) (stories)
- 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.
- 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
- Kuhl, Jackson (fl. 1990s-2010s) (stories)
- See www.jacksonkuhl.com/blog