- Norwood, Warren (Carl) (1945-2005) (stories) (assoc.)
- See www.sf-encyclopedia.com/entry/norwood_warren_c
- Notkin, Deborah L. (fl. 1970s-2010s) (stories) (assoc.)
- See fancyclopedia.org/debbie-notkin
- Nourse, Alan E(dward) (1928-1992) (stories) (assoc.)
- See www.sf-encyclopedia.com/entry/nourse_alan_e
- Novik, Naomi (1973- ) (stories) (assoc.)
- See en.wikipedia.org/wiki/Naomi_Novik
- Nowlan, Philip Francis (1888-1940) (stories) (assoc.)
- See www.sf-encyclopedia.com/entry/nowlan_philip_francis
- Noyes, Alfred (1880-1958) (stories) (assoc.)
- See www.sf-encyclopedia.com/entry/noyes_alfred
- Noyes, Ralph (1923?-1998) (stories) (assoc.)
- See www.sf-encyclopedia.com/entry/noyes_ralph
- Nuetzel, Charles (Alexander) (1934- ) (stories) (assoc.)
- See www.sf-encyclopedia.com/entry/nuetzel_charles
- Nunes, Claude (1924- ) (stories) (assoc.)
- See www.sf-encyclopedia.com/entry/nunes_claude
- Nussbaum, Abigail (1981- ) (stories)
- See wrongquestions.blogspot.co.uk
- Nyberg, Björn (Emil Oscar) (1929- ) (stories) (assoc.)
- See en.wikipedia.org/wiki/Bj%C3%B6rn_Nyberg
- Nye, Jody Lynn (1957- ) (stories) (assoc.)
- See www.sf-encyclopedia.com/entry/nye_jody_lynn
- Nye, Robert (1939-2016) (stories) (assoc.)
- See en.wikipedia.org/wiki/Robert_Nye
- Nylund, Eric S. (1964- ) (stories) (assoc.)
- See www.sf-encyclopedia.com/entry/nylund_eric_s
- Oakes, Philip (Barlow) (1928-2005) (stories) (assoc.)
- See www.sf-encyclopedia.com/entry/oakes_philip
- Oates, Joyce Carol (1938- ) (stories) (assoc.)
- See en.wikipedia.org/wiki/Joyce_Carol_Oates
- Oberth, Hermann (Julius) (1894-?) (stories) (assoc.)
- See www.sf-encyclopedia.com/entry/oberth_hermann
- Oboler, Arch(ie) (1909-1987) (stories) (assoc.)
- See www.sf-encyclopedia.com/entry/oboler_arch
- OBrien, (Michael) Fitz-James (1828-1862) (stories) (assoc.)
- See www.sf-encyclopedia.com/entry/obrien_fitz-james
- OBrien, Flann; pseudonym of Brian O Nuallain (1911-1966) (stories) (assoc.)
- See www.sf-encyclopedia.com/entry/obrien_flann
- OBrien, Robert C.; pseudonym of Robert Leslie Carroll Conly (1922-1973) (stories) (assoc.)
- See www.sf-encyclopedia.com/entry/obrien_robert_c
- OBrien, (William) Tim(othy) (1946- ) (stories) (assoc.)
- See www.sf-encyclopedia.com/entry/obrien_tim
- Obruchev, Vladimir A(fanasevich) (1863-1956) (stories) (assoc.)
- See www.sf-encyclopedia.com/entry/obruchev_vladimir_a
- Obukhova, Lydia (1924- ) (stories) (assoc.)
- See www.sf-encyclopedia.com/entry/obukhova_lydia
- Ochse, Weston (1965- ) (stories) (assoc.)
- See en.wikipedia.org/wiki/Weston_Ochse
- OConnell, Jack (1959- ) (stories) (assoc.)
- See www.sf-encyclopedia.com/entry/oconnell_jack
- October, John; pseudonym of Christopher Portway (1923-2009) (stories) (assoc.)
- See www.sf-encyclopedia.com/entry/october_john
- ODonnell, Kevin, Jr. (1950-2012) (stories) (assoc.)
- See www.sf-encyclopedia.com/entry/odonnell_kevin_jr
- Offutt, Andrew J(efferson, V) (1934-2013) (stories) (assoc.)
- See www.sf-encyclopedia.com/entry/offutt_andrew_j
- OFlaherty, Liam (1896-1984) (stories) (assoc.)
- See en.wikipedia.org/wiki/Liam_O%27Flaherty
- Ogawa, Issui; pseudonym (1975- ) (stories) (assoc.)
- See www.sf-encyclopedia.com/entry/ogawa_issui
- Ognibene, Peter J(ohn) (1941- ) (stories) (assoc.)
- See www.sf-encyclopedia.com/entry/ognibene_peter_j
- Ohlson, (Douglas) Hereward (1907-1955) (stories) (assoc.)
- See www.sf-encyclopedia.com/entry/ohlson_hereward
- OKeefe, Claudia (Diane) (1958- ) (stories) (assoc.)
- See www.sf-encyclopedia.com/entry/okeefe_claudia
- Okorafor, Nnedi(mma Nkemdili) (1974- ) (stories) (assoc.)
- See en.wikipedia.org/wiki/Nnedi_Okorafor
- Olander, Joseph D(avid) (1939- ) (stories) (assoc.)
- See www.sf-encyclopedia.com/entry/olander_joseph_d
- Oldfield, Claude Houghton (1889-1961) (stories)
- Born in Sevenoaks, Kent, England; chartered accountant, civil servant and writer.
- OLeary, Brian (Todd) (1940- ) (stories) (assoc.)
- See www.sf-encyclopedia.com/entry/oleary_brian
- OLeary, Patrick (1952- ) (stories) (assoc.)
- See www.sf-encyclopedia.com/entry/oleary_patrick
- Oliver, (Symmes) Chad(wick) (1928-1993) (stories) (assoc.)
- See www.sf-encyclopedia.com/entry/oliver_chad
- Oliver, Lauren (fl. 2010s) (stories) (assoc.)
- See www.sf-encyclopedia.com/entry/oliver_lauren
- Olshaker, Mark (1951- ) (stories) (assoc.)
- See www.sf-encyclopedia.com/entry/olshaker_mark
- Olson, Eugene E. (1936-2018) (stories)
- See en.wikipedia.org/wiki/Brad_Steiger
- OMalley, Kathleen (Ann) (1955- ) (stories) (assoc.)
- See www.sf-encyclopedia.com/entry/omalley_kathleen
- ONeil, Denny [i.e., Dennis Joseph ONeil] (1939- ) (stories)
- See www.sf-encyclopedia.com/entry/oneil_dennis
- ONeill, Gerard K(itchen) (1927-1992) (stories) (assoc.)
- See en.wikipedia.org/wiki/Gerard_K._O%27Neill
- ONeill, John (fl. 2000s-2010s) (stories) (assoc.)
- See en.wikipedia.org/wiki/John_O%27Neill_(editor)
- ONeill, Joseph (James) (1878-1952) (stories) (assoc.)
- See www.sf-encyclopedia.com/entry/oneill_joseph
- ONeill, Kevin (1953- ) (stories) (assoc.)
- See en.wikipedia.org/wiki/Kevin_O%27Neill_(comics)
- Onions, (George) Oliver (1873-1961) (stories) (assoc.)
- Changed his name legally to George Oliver in 1918, but continued to write as Oliver Onions.
- Onopa, Robert (1943- ) (stories) (assoc.)
- See www.sf-encyclopedia.com/entry/onopa_robert
- Oparin, Aleksandr Ivanovich (1894-1980) (stories) (assoc.)
- See en.wikipedia.org/wiki/Alexander_Oparin
- Oppenheim, E(dward) Phillips (1866-1946) (stories) (assoc.)
- See www.sf-encyclopedia.com/entry/oppenheim_e_phillips
- Ordover, John J. (1962- ) (stories)
- See en.wikipedia.org/wiki/John_J._Ordover
- Ordway, Frederick I., III (1927-2014) (stories) (assoc.)
- See en.wikipedia.org/wiki/Frederick_I._Ordway_III
- Ore, Rebecca; pseudonym of Rebecca Brown (1948- ) (stories) (assoc.)
- See www.sf-encyclopedia.com/entry/ore_rebecca
- OReilly, John Boyle (1844-1890) (stories) (assoc.)
- See www.sf-encyclopedia.com/entry/oreilly_john_boyle
- Orgill, Douglas (William) (1922-1984) (stories) (assoc.)
- See www.sf-encyclopedia.com/entry/orgill_douglas
- ORiordan, Robert (Garrett) (1943- ) (stories) (assoc.)
- See www.sf-encyclopedia.com/entry/oriordan_robert
- Orkow, Ben (Harrison) (1896-1988) (stories) (assoc.)
- See www.sf-encyclopedia.com/entry/orkow_ben
- Orwell, George; pseudonym of Eric Blair (1903-1950) (stories) (assoc.)
- See en.wikipedia.org/wiki/George_Orwell
- Osborn, Marijane (fl. 1980s-2010s) (stories) (assoc.)
- See english.ucdavis.edu/people/directory/ansuz
- Osborne, Charles (Thomas) (1927-2017) (stories) (assoc.)
- See en.wikipedia.org/wiki/Charles_Osborne_(music_writer)
- Ottum, Bob [i.e., Robert K. Ottum] (1925-1986) (stories) (assoc.)
- See www.sf-encyclopedia.com/entry/ottum_bob
- Ould, Chris (1959?- ) (stories) (assoc.)
- See www.sf-encyclopedia.com/entry/ould_chris
- Owen, Frank (1893-1968) (stories) (assoc.)
- See tellersofweirdtales.blogspot.co.uk/2015/06/frank-owen-1893-1968.html
- Owen, James A. (fl. 1970s-2010s) (stories) (assoc.)
- See jamesaowen.com/
- Owen, Richard; pseudonym of Dennis Fawcett (1942- ) (stories) (assoc.)
- See www.sf-encyclopedia.com/entry/owen_richard
- Owings, Mark (Samuel) (1945-2009) (stories) (assoc.)
- See www.sf-encyclopedia.com/entry/owings_mark
- Oz, Amos [born Amos Klausner] (1939-2018) (stories) (assoc.)
- See en.wikipedia.org/wiki/Amos_Oz
- Pace, Susan Ann (1947- ) (stories)
- Born in Minnesota; has degrees in mathematics and computer science from U. of Illinois; living in San Jose, California.
- Packard, Edward (1931- ) (stories) (assoc.)
- See www.sf-encyclopedia.com/entry/packard_edward
- Page, Kathy (1958- ) (stories) (assoc.)
- See www.sf-encyclopedia.com/entry/page_kathy
- Page, Norvell W(ooten) (1904-1961) (stories) (assoc.)
- See www.sf-encyclopedia.com/entry/page_norvell_w
- Page, Spider; pseudonym of Donald H. Cormack (1936-1987) (stories) (assoc.)
- See www.sf-encyclopedia.com/entry/page_spider
- Page, Thomas (Walker, IV) (1942- ) (stories) (assoc.)
- See www.sf-encyclopedia.com/entry/page_thomas
- Pagetti, Carlo (1945- ) (stories) (assoc.)
- See www.sf-encyclopedia.com/entry/pagetti_carlo
- Paine, James Welcome (1953- ) (stories)
- Born and living in California; former newspaper and magazine editor.
- Pak, Chris (fl. 2010s) (stories)
- See lancaster.academia.edu/ChrisPak
- Palmatier, Joshua (1972- ) (stories) (assoc.)
- See www.joshuapalmatier.com
- Palmer, Bernard (Alvin) (1914-1998) (stories) (assoc.)
- See www.sf-encyclopedia.com/entry/palmer_bernard
- Palmer, David R(eay) (1941- ) (stories) (assoc.)
- See www.sf-encyclopedia.com/entry/palmer_david
- Palmer, Jane (1946- ) (stories) (assoc.)
- See www.sf-encyclopedia.com/entry/palmer_jane
- Palmer, Philip (1960- ) (stories) (assoc.)
- See www.sf-encyclopedia.com/entry/palmer_philip
- Palmer, Raymond A(rthur) (1910-1977) (stories) (assoc.)
- See www.sf-encyclopedia.com/entry/palmer_raymond_a
- Palmer, Stephen (1962- ) (stories) (assoc.)
- See www.sf-encyclopedia.com/entry/palmer_stephen
- Palmer, Thomas (1955- ) (stories) (assoc.)
- See www.sf-encyclopedia.com/entry/palmer_thomas
- Paltock, Robert (1697-1767) (stories) (assoc.)
- See www.sf-encyclopedia.com/entry/paltock_robert
- Palwick, Susan (1959- ) (stories) (assoc.)
- See www.sf-encyclopedia.com/entry/palwick_susan
- Pangborn, Edgar (1909-1976) (stories) (assoc.)
- See www.sf-encyclopedia.com/entry/pangborn_edgar
- Panshin, Alexei [i.e., Alexis Adams Panshin] (1940- ) (stories) (assoc.)
- See www.sf-encyclopedia.com/entry/panshin_alexei
- Panshin, Cory (Seidman) (1947- ) (stories) (assoc.)
- See www.sf-encyclopedia.com/entry/panshin_cory
- Pape, Richard (Bernard) (1916-1995) (stories) (assoc.)
- See www.sf-encyclopedia.com/entry/pape_richard
- Pardoe, Margot [i.e., Margot Pardoe Swift] (1902-1996) (stories) (assoc.)
- Born in London, England; educated in Hertfordshire and Paris; died in Norfolk.
- Parenteau, Shirley (Laurolyn) (1935- ) (stories) (assoc.)
- See www.sf-encyclopedia.com/entry/parenteau_shirley
- Park, Paul (Claibourne) (1954- ) (stories) (assoc.)
- See www.sf-encyclopedia.com/entry/park_paul
- Park, Severna; pseudonym of Suzanne Feldman (1958- ) (stories) (assoc.)
- See sf-encyclopedia.com/entry/park_severna
- Parker, K. J.; pseudonym of Tom Holt (1961- ) (stories) (assoc.)
- See en.wikipedia.org/wiki/K.J._Parker
- Parker, Richard (1915-1990) (stories) (assoc.)
- See www.sf-encyclopedia.com/entry/parker_richard
- Parnov, Yeremei (Iudovich) (1935- ) (stories) (assoc.)
- See www.sf-encyclopedia.com/entry/parnov_eremei