- Kuhlhoff, Pete [i.e., Elbert Herman Kuhlhoff] (1903-1972) (art)
- See pulpartists.com/Kuhlhoff.html
- Kuhring, Ludwig Paul (1890-?) (stories)
- Writer; spent time in the armed forces and working in construction. Born in Toronto, Canada; lived in Ottawa, Canada.
- Kummer, Frederic Arnold (Sr.) (1873-1943) (stories)
- 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.
- Künstler, Morton (1931- ) (art)
- See en.wikipedia.org/wiki/Mort_K%C3%BCnstler
- 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 Mar, Bud (fl. 1920s-1930s) (stories)
- Cowboy artist and author, was for a time the Arena Director of the Sunshine Park, near Norfolk, Nebraska, which used to host rodeos and was a dance hall.
- Lake, Alexander (1895-?) (stories)
- Hunter, explorer of Africa.
- Lamb, Charles (1775-1834) (stories)
- See en.wikipedia.org/wiki/Charles_Lamb
- Lamb, Harold A(lbert) (1892-1962) (stories)
- See pulpflakes.blogspot.com/2012/05/harold-lamb-adventure-short-story.html
- LAmour, Beau (fl. 1990s-2000s) (stories)
- See beaulamour.com
- Landon, Herman (A.) (1882-1960) (stories)
- 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.
- Landor, Walter Savage (1775-1864) (stories)
- See en.wikipedia.org/wiki/Walter_Savage_Landor
- Lapham, Stanton C. (1876-?) (stories)
- Writer. Born in Michigan; lived in Oregon.
- LaSalle, Charles [born Charles Louis Lassell] (1894-1958) (art)
- See pulpartists.com/laSalle.html
- Latham, John H(oward) (1917-2001) (stories)
- See new.losttreasure.com/Home/AboutUs
- Lauriston, Victor [born William Edward Park] (1881-1973) (stories)
- Born in Fletcher, Ontario.
- Lavender, David (Sievert) (1910- ) (stories)
- Teacher, writer. Born in Telluride, Colorado; resident in California.
- Lawrence, Joseph I(vers) (1879-1963) (stories)
- Born in Worcester, Massachusetts; died in Miami, Florida; editor and publisher.
- Lazenby, Norman (Austin) (1914-2003) (stories)
- See www.sf-encyclopedia.com/entry/lazenby_norman_a
- Le Queux, William (Tufnell) (1864-1927) (stories)
- See en.wikipedia.org/wiki/William_Le_Queux
- Leach, (Leonard) Douglas (1898-1987) (stories)
- See bearalley.blogspot.co.uk/2008/01/douglas-leach.html
- Lee, M(arshall) Lincoln (1921-2010) (stories)
- See pulpartists.com/Lee.html
- Lefton, Abe (1882-1958) (stories)
- See www.imdb.com/name/nm0499108
- Leggett, H(arry) W(illiam) (1888-1957) (stories)
- Born in St. Saviour, England; died in London; editor of various publications, including Grand Magazine and Ironmongers Weekly.
- Leigh, William R(obinson) (1866-1955) (art)
- See en.wikipedia.org/wiki/William_Robinson_Leigh
- Leinster, Murray; pseudonym of Will F. Jenkins (1896-1975) (stories)
- See www.sf-encyclopedia.com/entry/leinster_murray
- Leitfred, Robert H(enry) (1891-1968) (stories)
- See pulpflakes.blogspot.co.uk/2017/07/robert-h-leitfred-author.html
- LeMay, Alan (Brown) (1899-1964) (stories)
- Novelist, popular for his westerns. Born in Indianapolis, Indiana; lived in Santee, California; died in Hollywood, California.
- Leonard, Orville (Henry) (1868-1924) (stories)
- Poet and newspaperman. Died in New Canaan, Connecticut.
- Leroux, Gaston (1868-1927) (stories)
- See www.sf-encyclopedia.com/entry/leroux_gaston
- Leslie, Jean [i.e., Jean Leslie Cornett] (1908-1994) (stories)
- Born in Omaha, raised in Santa Monica; teaching fellow in psychology.
- Lesser, Ron (fl. 1960s-2010s) (art)
- See artbyronlesser.com
- Leverage, (Carl) Henry (1885-1931) (stories)
- Writer and editor; spent time in Sing-Sing and was released in 1919. Born in London, England; brought to the United States at an early age; died in Middletown, New York.
- Levison, Eric (1894-?) (stories)
- Born in Prussia; served in the U.S. Navy; living in Georgia in the 1920s.
- Lewis, Alfred Henry (1857-1914) (stories)
- See en.wikipedia.org/wiki/Alfred_Henry_Lewis
- Lewis, [Captain] George Warburton (1878-1963) (stories)
- Police officer in various places, including Puerto Rico; a traveller; also wrote poetry.
- Leys, John K(irkwood) (1847-1909) (stories)
- See www.victorianresearch.org/atcl/show_author.php?aid=556
- Liebe, Charles Haven [born Charles William Liebe] (1880-1957) (stories)
- See pulpflakes.blogspot.com/2012/10/charles-haven-liebe-aka-hapsburg-liebe.html
- Liebe, Hapsburg; pseudonym of Charles Haven Liebe (1880-1957) (stories)
- See pulpflakes.blogspot.com/2012/10/charles-haven-liebe-aka-hapsburg-liebe.html
- Liggett, Walter W(illiam) (1886-1935) (stories)
- Born in Benson, Minnesota.
- Lillis, Richard (James) (1899-1994) (art)
- See pulpartists.com/Lillis.html
- Linaker, Michael (Robert) (1940- ) (stories)
- See piccadillypublishing.org/hunter.html
- Lincoln, E(lliott) C(urtis) (1884-1970) (stories) (assoc.)
- Poet. No other information available.
- Lindroos, Juha (Tapio) (1971- ) (art)
- See en.wikipedia.org/wiki/J._T._Lindroos
- Linford, Dee [i.e., Deverl Hess Linford] (1915-1971) (stories)
- See pulpflakes.blogspot.co.uk/2016/10/dee-linford-western-author-journalist.html
- Livingston, Berkeley (1909-1975) (stories)
- See www.sf-encyclopedia.com/entry/livingston_berkeley
- Lloyd, Stanley (1880-1954?) (art)
- Born in Liverpool, England; well known book illustrator.
- Locker, Arthur (1828-1893) (stories)
- See en.wikipedia.org/wiki/Arthur_Locker
- Lockhart, Caroline (Cameron) (1871-1962) (stories)
- Born in Eagle Point, Illinois; raised in Kansas; reporter for newspapers in Boston, Philadelphia and Denver; owned a newspaper in Cody, Wyoming; bought a ranch in Dryhead, Montana, in 1926 and lived there until 1950; died in Cody.
- London, Jack [born John Griffith Chaney] (1876-1916) (stories)
- See en.wikipedia.org/wiki/Jack_London
- Long, Frank Belknap (Jr.) (1903-1994) (stories)
- See www.sf-encyclopedia.com/entry/long_frank_belknap
- Long, James Parker (1890?-1970) (stories)
- Insurance executive. Born in Rangoon, Burma; died in Naples, New York.
- Longfellow, Henry Wadsworth (1807-1882) (stories)
- See en.wikipedia.org/wiki/Henry_Wadsworth_Longfellow
- Loomis, Noel (Miller) (1905-1969) (stories)
- See www.sf-encyclopedia.com/entry/loomis_noel
- Lough, Glenn Dale (1906-1991) (stories)
- See www.mysteryfile.com/GLow/Author.html
- Lovelace, Richard (1617-1657) (stories)
- See en.wikipedia.org/wiki/Richard_Lovelace
- Lovell, Tom [i.e., Thomas Lovell] (1909-1997) (art)
- See pulpartists.com/Lovell.html
- Lowdermilk, Romaine H. (1890-1970) (stories)
- Writer. Born in Chetopa, Kansas; lived in Arizona.
- Lowell, James Russell (1819-1891) (stories)
- See en.wikipedia.org/wiki/James_Russell_Lowell
- Lowndes, Robert A(ugustine) W(ard) (1916-1998) (stories)
- See www.sf-encyclopedia.com/entry/lowndes_robert_a_w
- Luberoff, William E(dward) (1910-2002) (art)
- See pulpartists.com/Luberoff.html
- Lucas, Barbara Tad (1902-1990) (stories)
- See www.cowgirl.net/portfolios/tad-lucas
- Luce, Willard (1914-1990) (stories)
- In addition to westerns wrote childrens books, and photographed and wrote on travel and wildlife.
- Lucia, Ellis (Joel) (1919-1980) (stories)
- Newspaperman, writer, western afficianado. Born in Watsonville, California; resident in Portland, Oregon.
- 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.
- 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.
- Luros, Milton [born Milton Louis Rosenblatt] (1911-1999) (art)
- See pulpartists.com/Luros.html
- Lutz, Giles A(lfred) (1910-1982) (stories)
- See en.wikipedia.org/wiki/Giles_A._Lutz
- 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
- Lynde, Francis (1856-1930) (stories)
- See www.sf-encyclopedia.com/entry/lynde_francis
- Lyon, Richard (Elmer) (1913-2002) (art)
- See pulpartists.com/Lyon.html
- Lytle, William Haines (1826-1863) (stories)
- See en.wikipedia.org/wiki/William_Haines_Lytle
- MacDonald, A(lexander) B(lack) (1871-1942) (stories)
- See www.revolvy.com/page/A.-B.-MacDonald
- MacDonald, John D(ann) (1916-1986) (stories)
- See en.wikipedia.org/wiki/John_D._MacDonald
- MacDonald, (Allan) William Colt (1891-1968) (stories)
- Born in Michigan; lived most of his life in the West; prolific author of westerns.
- MacGowan, Alice (L.) (1858-1947) (stories)
- Born in Perrysburg, Ohio; died in Los Gatos, California. Sister of Grace MacGowan Cooke.
- MacIsaac, Fred(erick John) (1886-1940) (stories)
- See www.sf-encyclopedia.com/entry/macisaac_fred
- MacMahon, William Marcus (1876-1931) (stories)
- See www.findagrave.com/cgi-bin/fg.cgi?page=gr&GRid=89270900
- Maguire, Robert (A.) (1921-2005) (art)
- See en.wikipedia.org/wiki/Robert_Maguire
- Mahaffay, Robert E(rvine) (1890-1967) (stories)
- Interested in railroads.
- Malone, Thomas J. (fl. 1920s-1930s) (stories)
- Not the dealer in wholesale fish (1859-1920).
- Manchess, Gregory (1955- ) (art)
- See en.wikipedia.org/wiki/Gregory_Manchess
- Maneely, Joe (1926-1958) (art)
- See en.wikipedia.org/wiki/Joe_Maneely
- Mann, E(dward) B(everly) (1902- ) (stories)
- Author of westerns, editor. Born in Hollis, Kansas.
- Manners, David X. (1912-2007) (stories)
- According to his son Tim he wasnt actually David X. Manners but was David X Manners as the X was his whole name and not an initial.
- Marchant, Bessie [i.e., Elizabeth Marchant Comfort] (1862-1941) (stories)
- Born in Petham, Kent; educated privately; wrote more than 150 books for young people.
- Marks, E(lmer) L. ({c}1894-?) (stories)
- Born in Illinois; worked in the yards as a shipbuilder in Los Angeles, California.
- Marlowe, Christopher (1564-1593) (stories)
- See en.wikipedia.org/wiki/Christopher_Marlowe
- Marlowe, Stephen [born Milton Lesser] (1928-2008) (stories)
- See en.wikipedia.org/wiki/Stephen_Marlowe
- Marmur, Jacland (1901-1970) (stories)
- Author and explorer. Born in Sosnowiec, Poland; came to the United States in 1918; died in San Rafael, California (?).
- Marquis, George Bruce (1879-?) (stories)
- Writer. Born in Kansas; lived in Walla Walla, Washington.