- Morgan, Bassett; pseudonym of Grace Jones (1884-1977) (stories)
- See desturmobed.blogspot.co.uk/2011/12/bassett-morgan.html
- Morgan, Deborah (fl. 1990s-2000s) (stories)
- See www.deborahmorgan.com
- Morgan, Howard E(lmer) (1892?-1933) (stories) (assoc.)
- Writer of westerns and animal stories. Born in Unionville, Connecticut; died in Hartsdale, New York.
- Moroso, John A(ntonio) (1874-1957) (stories)
- Born in Charleston, South Carolina; graduate of South Carolina Military Academy; author, criminologist, newspaperman and playwright; assistant city editor of the New York American; reporter for William Randolph Hearst and for the New York Times; died in upstate New York.
- Morris, George Pope (1802-1864) (stories)
- See en.wikipedia.org/wiki/George_Pope_Morris
- Morris, Gouverneur (1876-1953) (stories)
- See www.sf-encyclopedia.com/entry/morris_gouverneur
- Morris, William (1834-1896) (stories)
- See www.sf-encyclopedia.com/entry/morris_william
- Moses, Kingsley (1890?-?) (stories)
- Journalist, editor, spent time abroad. Born in Philadelphia, Pennsylvania; lived in East Hampton, New York.
- Moskowitz, Sam(uel Martin) (1920-1997) (stories)
- See www.sf-encyclopedia.com/entry/moskowitz_sam
- Mott, Edward Spencer (1844-1910) (stories)
- Born in Staffordshire; after army service in India and Burma pursued a theatrical career, writing operettas, pantomimes and burlesques.
- Mott, Herb(ert Morford, Jr.) (1923- ) (art)
- See pulpartists.com/Mott.html
- Mowery, William Byron (1899-1957) (stories)
- Teacher, naturalist and novelist. Born in Adelphia, Ohio; on faculty at University of Illinois, then became full time writer, with more than 450 published stories, screenwriter.
- Mulford, Clarence E(dward) (1883-1956) (stories)
- See en.wikipedia.org/wiki/Clarence_E._Mulford
- Mulford, (Mitchell) Stockton (1886-1960) (art)
- See pulpartists.com/Mulford.html
- Mulkey, L(utella) Lindley (1893-1971) (stories)
- See www.findagrave.com/memorial/172019211/lutella-mulkey
- Mumford, Ethel Watts [i.e., Ethel Watts Mumford Grant] (1873-1940) (stories)
- Playwright, poet, novelist. Born and died in New York City.
- Mumford, Manly S(tearns) (1898-1984) (stories)
- See www.mumford.cx/msm-bio.html
- Mundy, Talbot; pseudonym of William Lancaster Gribbon (1879-1940) (stories)
- See www.sf-encyclopedia.com/entry/mundy_talbot
- Munn, Wayne (1896-1931) (stories) (assoc.)
- See en.wikipedia.org/wiki/Wayne_Munn
- Murphy, C(ornelius) A(nthony) (1898-1984) (art)
- See pulpartists.com/MurphyCA.html
- Murphy, H(enry) C(ruse, Jr.) (1886-1931) (art)
- See pulpartists.com/MurphyHC.html
- Murray, Thomas J. (fl. 1910s-1940s) (stories)
- Perhaps educator Thomas Jefferson Murray (1891-1961).
- Myers, J(ohn) Jay (1919-2011) (stories)
- Retired Santa Fe teacher.
- Nafziger, Ray(mond Earl) (1895-1946) (stories)
- lived in New Mexico and California; died September 12, 1946 in a Denver Hospital.
- Nashe, Thomas (1567-1601) (stories)
- See en.wikipedia.org/wiki/Thomas_Nashe
- Nathan, Robert (Gruntal) (1894-1985) (stories)
- See www.sf-encyclopedia.com/entry/nathan_robert
- Nebel, (Louis) Frederick (1903-1967) (stories)
- Born in New York City; contributed fiction to magazines.
- Neff, Wesley (1895-1976) (art)
- See pulpartists.com/Neff.html
- Nelson, Bruce (Opie) (1914- ) (stories)
- Writer, journalist, expert on Dakota Indians. Born in North Dakota; lived in Bismarck, North Dakota.
- Nelson, Ralph (1885-1953) (art)
- See pulpartists.com/Nelson.html
- Newark, Peter (D.) (1933- ) (stories)
- See bearalley.blogspot.co.uk/2013/09/peter-newark.html
- Newbury, De Witt (1888-1967) (stories)
- See desturmobed.blogspot.co.uk/2011/07/de-witt-newbury.html
- Newsom, J(ohn) D(immock) (1893?-1954) (stories)
- See pulpflakes.blogspot.com/2013/07/john-d-newsom-obituary-in-new-york.html
- Newsome, Muriel (Naomi) (1908-2000) (stories)
- Wrote westerns as Muriel Evans and as Ed Newsom.
- Newton, Douglas; pseudonym of Wilfrid Bernard M. Newton (1884-1951) (stories)
- See www.sf-encyclopedia.com/entry/newton_w_douglas
- Newton, Wilfrid Bernard M(ichael) (1884-1951) (stories)
- See www.sf-encyclopedia.com/entry/newton_w_douglas
- Nichols, I. M. (fl. 1920s) (stories)
- A woman writer; perhaps philanthropist Isabel McIlhenny Nichols (d. 1941), although this is improbable. From Fenville, Michigan.
- Nicholson, Meredith (1866-1947) (stories)
- Born in Crawfordsville, Indiana; had degrees from Wabash College, Butler College, and Indiana University; newspaperman; author and essayist.
- Nickels, Samuel H(enderson) (1883-1950) (stories)
- Born in Williamsburg, Kentucky. Owned a ranch in Carrizozo, New Mexico. Wrote pulp-fiction western short stories to contribute to the familys income. He was also a gifted musician, capable of playing multiple instruments.
- Niven, Frederick (John) (1878-1944) (stories)
- Born in Valparaiso.
- Nolan, Frederick (William) (1931- ) (stories)
- See en.wikipedia.org/wiki/Frederick_Nolan
- Norman, James; pseudonym of James Norman Schmidt (1912-1983) (stories)
- See www.ruemorguepress.com/authors/norman.html
- Norman, Noel Wilson (1901-1981) (stories)
- Born in Tasmania.
- Norris, (Benjamin) Frank(lin) (1870-1902) (stories)
- See en.wikipedia.org/wiki/Frank_Norris
- Norris, Kathleen (Thompson) (1880-1966) (stories)
- Novelist, short story writer, feminist. Born and died in San Francisco, California.
- Norton, Alden H(olmes) (1903-1987) (stories)
- Author and 13th editor of Adventure magazine. Born in Lynn, Massachusetts; died in Brooklyn, New York. Norton contributed prolifically to Adventure, but he did so under a number of pseudonyms.
- Norton, Henry A. Hal [i.e., Henry M. Norton] (1906-1975) (stories)
- See archiveswest.orbiscascade.org/ark:/80444/xv64996
- Norton, Roy (E.) (1869-1942) (stories)
- See bearalley.blogspot.co.uk/2009/09/roy-norton-man-who-died-twice.html
- Nostrand, Howard (1929-1984) (art)
- See en.wikipedia.org/wiki/Howard_Nostrand
- Nye, Nelson C(oral) (1907- ) (stories)
- See en.wikipedia.org/wiki/Nelson_C._Nye
- Oblinger, Michael M. (fl. 1920s-1950s) (stories)
- Although there appears to be an M.D. by this name in Virginia.
- Oblinger, Milo Milton (1890-1963) (stories)
- Born in Arlington, Minnesota; newspaper journalist.
- OFarrell, Brigid (fl. 1930s) (stories)
- Name also given as Brigid OFarrel.
- Ogan, George (F.) (1912-1983) (stories)
- Writer and teacher. Born in Kirkwood, Missouri; lived in Louisiana.
- Ogan, Margaret (E. Nettles) (1923-1979) (stories)
- Teacher and writer, born in Columbia, Louisiana.
- Ogden, G(eorge) W(ashington) (1871-1966) (stories) (assoc.)
- Born in Kansas, died in Los Angeles; a newspaperman who became a prolific author of westerns in later life.
- OHagan, Anne (1869-1933) (stories)
- See en.wikipedia.org/wiki/Anne_O%27Hagan_Shinn
- Old Scout, An; house pseudonym (fl. 1910s-1920s) (stories)
- See www.sf-encyclopedia.com/entry/old_scout_an
- Oliphant, Ronald (1884-1968) (stories)
- See freespace.virgin.net/audrey.parnhamandco/Bhe/Laurie1.htm
- Olmsted, Harry F(rancis) (1889-1970) (stories)
- Born August 10, 1889 in Los Angeles; worked as a civil engineer before turning to fiction; claimed to have sold 1200 stories; died April 2, 1970 in Riverside, California.
- Oppenheim, E(dward) Phillips (1866-1946) (stories)
- See www.sf-encyclopedia.com/entry/oppenheim_e_phillips
- Orban, Paul (1896-1974) (art)
- See pulpartists.com/Orban.html
- Orcutt, Eddy (fl. 1930s-1950s) (stories)
- Almost certainly resident in San Diego, California.
- OReilly, John Boyle (1844-1890) (stories)
- See www.sf-encyclopedia.com/entry/oreilly_john_boyle
- ORourke, Frank (1916-1989) (stories)
- See www.sf-encyclopedia.com/entry/orourke_frank
- Osborne, William Hamilton (1873-1942) (stories)
- See www.jerseyhistory.org/findingaid.php?aid=1137
- Ostby, Gertrude Enid (1920-2012) (stories)
- See www.anewtradition.com/obituaries/obituary/5133_Gertrude_Enid_Ostby
- OSullivan, William (fl. 1900s-1960s) (stories)
- probably a house pseudonym.
- Ott, Anthony B. (fl. 1940s-1950s) (stories)
- possibly a pseudonym.
- Otway, Leslie (fl. 1920s-1930s) (art)
- See bearalley.blogspot.com/2007/01/leslie-otway.html
- Overholser, Stephen (1944- ) (stories)
- See www.sf-encyclopedia.com/entry/overholser_stephen
- Overholser, Wayne D. (1906-1996) (stories) (assoc.)
- See en.wikipedia.org/wiki/Wayne_D._Overholser
- Overman, Beulah Rhodes (1894-1990) (stories)
- See newsok.com/beulah-rhodes-overman/article/2340740
- Owen, Dean; pseudonym of Dudley Dean McGaughey (1909-1986) (stories)
- See www.sf-encyclopedia.com/entry/owen_dean
- Oyen, (Olaf) Henry (1883-1921) (stories)
- See pulpflakes.blogspot.com/2013/01/henry-oyen-reporter-pulp-author.html
- Packard, Frank (Lucius) (1877-1942) (stories)
- See www.sf-encyclopedia.com/entry/packard_frank_l
- Page, Norvell W(ooten) (1904-1961) (stories)
- See www.sf-encyclopedia.com/entry/page_norvell_w
- Paine, Albert B(igelow) (1861-1937) (stories)
- See www.sf-encyclopedia.com/entry/paine_albert_b
- Paine, Lauran (Bosworth) (1916-2001) (stories)
- See www.sf-encyclopedia.com/entry/paine_lauran
- Painton, Frederick C. (1896?-1945) (stories)
- Writer, war correspondent. Died in Guam.
- Palmer, Delos, Jr. (1890-1960) (art)
- See pulpartists.com/Palmer.html
- Palmer, Raymond A(rthur) (1910-1977) (stories)
- See www.sf-encyclopedia.com/entry/palmer_raymond_a
- Pancoast, Chalmers L(owell) (1880-1965) (stories)
- Born in Ohio; employed with various newspapers and magazines; lived mostly in Newark.
- Parker, Eric R. (1898-1974) (art)
- See illustrators.wikia.com/wiki/Eric_R._Parker_(1898-1974)
- Parker, Maude [i.e., Maude Louise Parker Child Pavenstedt] (1892-1959) (stories)
- Born in Galveston, Texas; attended University of Wisconsin; first married to Richard Washburn Child, and was with Child when he was Ambassador to Italy in the 1920s; then married lawyer Edmund W. Pavenstedt; died in New York City.
- Parkhill, Forbes (1892-1974) (stories)
- Born and lived in Denver; died in San Diego.
- Parkhurst, H(arry) L(emon) V(ictor) (1876-1962) (art)
- See pulpartists.com/Parkhurst.html
- Parks, Mary (1910-1997) (stories)
- See www.cowgirl.net/portfolios/mary-parks
- Patenaude, Roland (Joseph) (1912-1989) (art)
- See pulpartists.com/Patenaude.html
- Paterson, J(ames) Phillips (1877-1948) (art)
- See bearalley.blogspot.co.uk/2017/08/j-phillips-paterson.html
- Patmore, Coventry (Kersey Dighton) (1823-1896) (stories)
- See en.wikipedia.org/wiki/Coventry_Patmore
- Patten, Lewis B(yford) (1915-1981) (stories)
- See en.wikipedia.org/wiki/Lewis_B._Patten
- Patten, William George (1866-1945) (stories)
- Author of numerous Frank Merriwell novels under the pseudonym Burt L. Standish. Born in Corinna, Maine; died in Vista, California. Note: Patten was born William George Patten and is carried that way in some bibliographies.