- Constantine, Peter (1963- ) (stories)
- See en.wikipedia.org/wiki/Peter_Constantine
- Constantine, Storm (1956- ) (stories) (assoc.)
- See www.sf-encyclopedia.com/entry/constantine_storm
- Constiner, (Francis) Merle (1902-1979) (stories) (assoc.)
- See pulpflakes.blogspot.com/2019/01/merle-constiner-biographical-article.html
- Contento, William G(uy) (1947- ) (stories) (assoc.)
- See www.sf-encyclopedia.com/entry/contento_william_g
- Conti, Italia (Emily Stella) (1873-1946) (stories) (assoc.)
- See en.wikipedia.org/wiki/Italia_Conti
- Contoski, Victor (1936- ) (stories)
- See en.wikipedia.org/wiki/Victor_Contoski
- Converse, Florence (1871-1967) (stories)
- Born in New Orleans; educated at Wellesley College; on editorial staff, New York Churchman, 1900-1908, Atlantic Monthly, 1908-1931.
- Converse, Frank H. (1843-1889) (stories)
- See www.sf-encyclopedia.com/entry/converse_frank_h
- Conway, C. J. (fl. 2010s) (stories)
- See cjconway.com
- Conway, Erik M. (1965- ) (stories) (assoc.)
- See en.wikipedia.org/wiki/Erik_M._Conway
- Conway, Gerard F. (1952- ) (stories)
- See www.sf-encyclopedia.com/entry/conway_gerard_f
- Conway, Hugh; pseudonym of F. J. Fargus (1847-1885) (stories)
- See en.wikipedia.org/wiki/Hugh_Conway
- Conway, James L. (1950- ) (stories) (assoc.)
- See en.wikipedia.org/wiki/James_L._Conway
- Conway, Jill (Kathryn) Ker (1934-2018) (stories)
- Former president of Smith College.
- Conway, Kyle ({c}1988- ) (art)
- See www.plaguejester.deviantart.com
- Conway, M(oncure) D(aniel) (1832-1907) (stories)
- See en.wikipedia.org/wiki/Moncure_D._Conway
- Conway, [Sir] (William) Martin (, 1st Baron Conway of Allington) (1856-1937) (stories) (assoc.)
- See en.wikipedia.org/wiki/Martin_Conway,_1st_Baron_Conway_of_Allington
- Conybeare, F(rederick) C(ornwallis) (1856-1924) (stories)
- See en.wikipedia.org/wiki/Frederick_Cornwallis_Conybeare
- Conyers, Dorothea [i.e., Dorothea Blood-Smyth Conyers White] (1869-1949) (stories)
- Born in Bedamore, County Limerick, Ireland; died in Nantinan, County Limerick.
- Cook, Alan (Lincoln) (1938- ) (stories)
- Computer scientist turned writer.
- Cook, Albert Jay (fl. 1910s-1930s) (stories) (art)
- Probably not the banker and surgeon (1849?-1931).
- Cook, Benjamin (1982- ) (stories) (assoc.)
- See en.wikipedia.org/wiki/Benjamin_Cook_(journalist)
- Cook, Berton E(llsworth) (1889-1958) (stories)
- See pulpflakes.blogspot.co.uk/2017/02/berton-e-cook-sailor-teacher-author.html
- Cook, (Edward) Dutton (1831-1883) (stories)
- Son of a prosperous London solicitor; was drama critic of Pall Mall Gazette 1867-1875 and Cornhill 1867-1871; novelist and author of books on the theatre.
- Cook, [Sir] E(dward) T(yas) (1857-1919) (stories)
- See en.wikipedia.org/wiki/Edward_Tyas_Cook
- Cook, [Lady] Emily Constance (Baird) (fl. 1890s) (stories)
- wife of Sir Edward Tyas Cook.
- Cook, [Captain] Francis A(ugustus) (1843-1916) (stories)
- See en.wikipedia.org/wiki/Francis_A._Cook
- Cook, Glen (Charles) (1944- ) (stories) (assoc.)
- See www.sf-encyclopedia.com/entry/cook_glen
- Cook, Harold Lewis (1897-1989) (stories) (art)
- See en.wikipedia.org/wiki/Harold_Lewis_Cook
- Cook, Hugh (Walter Gilbert) (1956-2008) (stories) (assoc.)
- See www.sf-encyclopedia.com/entry/cook_hugh
- Cook, Ida (1904-1986) (stories)
- See en.wikipedia.org/wiki/Mary_Burchell
- Cook, [Captain] James (1728-1779) (stories) (assoc.)
- See en.wikipedia.org/wiki/James_Cook
- Cook, Jeffrey (fl. 2010s) (stories)
- See www.dawnofsteam.net
- Cook, Johne (fl. 2000s-2010s) (stories)
- See amazingstoriesmag.com/2013/02/ray-gun-rewind-invoking-inigo/
- Cook, Kenneth (Bernard) (1929-1987) (stories) (assoc.)
- See www.sf-encyclopedia.com/entry/cook_kenneth
- Cook, (Richard Martin) Oscar (1888-1952) (stories) (assoc.)
- See tellersofweirdtales.blogspot.co.uk/2016/05/oscar-cook-1888-1952.html
- Cook, Paul (Harlin) (1950- ) (stories) (assoc.)
- See www.sf-encyclopedia.com/entry/cook_paul
- Cook, Rick [i.e., James Richard Cook] (1944- ) (stories)
- See www.sf-encyclopedia.com/entry/cook_rick
- Cook, Robin [i.e., Robert Brian Cook] (1940- ) (stories) (assoc.)
- See www.sf-encyclopedia.com/entry/cook_robin_2
- Cook, Storn (A.) (fl. 2010s) (art)
- See stornart.com
- Cook, [Sir] Theodore Andrea (1867-1928) (stories)
- See en.wikipedia.org/wiki/Theodore_Andrea_Cook
- Cook, W(illiam) Victor (1875-1955) (stories)
- Born in London; a journalist.
- Cook, Will(iam Everett) (1921-1964) (stories) (assoc.)
- See en.wikipedia.org/wiki/Will_Cook_(writer)
- Cook, William Wallace (1867-1933) (stories)
- See www.sf-encyclopedia.com/entry/cook_william_wallace
- Cooke, Arthur; pseudonym of C. M. Kornbluth (1923-1958), Robert A. W. Lowndes (1916-1998), John B. Michel (1917-1969), Donald A. Wollheim (1914-1990) & Elsie B. Wollheim (1910-1996) (stories)
- See www.sf-encyclopedia.com/entry/cooke_arthur
- Cooke, Grace MacGowan (1863-1944) (stories)
- Born in Ohio; grew up in Chattanooga; lived later in N.J. and California. Sister of Alice MacGowan.
- Cooke, Hereward Lester (1916-1973) (stories) (assoc.)
- See en.wikipedia.org/wiki/Hereward_Lester_Cooke
- Cooke, J(oseph) Y. F. ({c}1846-1918) (stories)
- Actor and writer.
- Cooke, John Esten (1830-1886) (stories)
- Born in Winchester, Virginia.
- Cooke, Marjorie Benton (1876-1920) (stories)
- Born in Richmond, Indiana.
- Cooke, Mary Eliza Louise [née Gripper] (1883-1941) (stories)
- See www.sf-encyclopedia.com/entry/conquest_joan
- Cooke, Rose Terry (1827-1892) (stories)
- See en.wikipedia.org/wiki/Rose_Terry_Cooke
- Cooke, Tim (fl. 2010s) (stories)
- See timcookefilm.tumblr.com
- Cooksley, (Sidney) Bert (fl. 1920s-1940s) (stories)
- California writer and poet.
- Cookson, Sybil Irene Eleanor Taylor (1890-1963) (stories)
- Born in Carshalton; educated at Wycombe Abbey and in Paris; an editor.
- Cool, Tom (1955- ) (stories) (assoc.)
- See www.sf-encyclopedia.com/entry/cool_tom
- Coolbrith, Ina D(onna) (1841-1928) (stories)
- See en.wikipedia.org/wiki/Ina_Coolbrith
- Coolen, Michael (fl. 2010s) (stories)
- See 2015willamettewritersconference.sched.org/michaelcoolen
- Cooley, Peter (1940- ) (stories)
- See en.wikipedia.org/wiki/Peter_Cooley
- Cooley, Winnifred Harper (1874-1967) (stories)
- See en.wikipedia.org/wiki/Winnifred_Harper_Cooley
- Coolidge, (Margaret) Olivia (Ensor) (1908-2006) (stories)
- See en.wikipedia.org/wiki/Olivia_Coolidge
- Coomaraswamy, Ananda K(entish) (1877-1947) (stories)
- See en.wikipedia.org/wiki/Ananda_Coomaraswamy
- Coombs, Charles (Ira) Chick (1914-1994) (stories) (assoc.)
- See www.sf-encyclopedia.com/entry/coombs_charles_i
- Coombs, Jack [i.e., John Wesley Coombs] (1882-1957) (stories)
- See en.wikipedia.org/wiki/Jack_Coombs
- Coon, Carleton S(tevens) (1904-1981) (stories) (assoc.)
- See en.wikipedia.org/wiki/Carleton_S._Coon
- Coon, Horace (Campbell) (1897-1961) (stories) (assoc.)
- See www.sf-encyclopedia.com/entry/coon_horace_c
- Coon, Scott D. (fl. 2000s-2010s) (stories)
- See www.scottcoonscifi.com
- Coon, Susan; pseudonym of Susan Plunkett (1945- ) (stories) (assoc.)
- See www.sf-encyclopedia.com/entry/coon_susan
- Cooney, Ann (fl. 2010s) (stories)
- See anncooney.com
- Cooney, C. S. E. (fl. 2000s-2010s) (stories) (assoc.)
- See csecooney.com
- Cooney, Michael (1921-1976?)
- See www.sf-encyclopedia.com/entry/cooney_michael
- Coonts, Stephen (Paul) (1946- ) (stories)
- See www.sf-encyclopedia.com/entry/coonts_stephen
- Cooper, A(dolphe) R(ichard) (1899-1988) (stories)
- See www.findagrave.com/cgi-bin/fg.cgi?page=gr&GRid=44818916
- Cooper, Artemis (1953- ) (stories) (assoc.)
- See en.wikipedia.org/wiki/Artemis_Cooper
- Cooper, (Evelyn) Barbara (née Mounteney) (1915-2001) (stories)
- Born in Loughborough, England; married Allan R. J. Cooper in 1938; went to New Zealand in 1949.
- Cooper, Brenda (fl. 2000s-2010s) (stories) (assoc.)
- See www.sf-encyclopedia.com/entry/cooper_brenda
- Cooper, Caribou Bill [i.e., William Frank Cooper] (1872-1933) (stories)
- See rapsvault.blogspot.co.uk/2013/07/caribou-bill.html
- Cooper, (Brenda) Clare (1935- ) (stories) (assoc.)
- See www.sf-encyclopedia.com/entry/cooper_clare
- Cooper, Constance (fl. 2000s-2010s) (stories)
- See www.constancecooper.com/p/about_1.html
- Cooper, Courtney Ryley (1886-1940) (stories) (art)
- Born in Kansas City, Missouri, ran away age 16 to become a circus clown; later sign painter and performer, circus general manager, press agent for William Buffalo Bill Cody; journalist in Kansas City, New York and Denver; lived in Florida; died in New York City.
- Cooper, Diana [i.e., Diana Olivia Winifred Maud Cooper, Viscountess Norwich (née Lady Diana Manners)] (1892-1986) (stories)
- See en.wikipedia.org/wiki/Lady_Diana_Cooper
- Cooper, (Gwaldys) Dorothy ({c}1912-1981?) (stories)
- Wrote romances under some eight names in the 1960s and was then living in Tangiers; once worked for the British Foreign Office.
- Cooper, (Alfred) Duff (1890-1954) (stories) (assoc.)
- Born in London; financial secretary to the War Office.
- Cooper, E(dward) H(erbert) (1867-1910) (stories)
- Born in Newcastle under Lyme; a journalist; disabled from childhood illness and spent much of life abroad, mostly in France.
- Cooper, Edgar L(eake) (1892-1945) (stories)
- Born and died in Texas; writer of western pulp fiction.
- Cooper, Edmund (1926-1982) (stories) (assoc.)
- See www.sf-encyclopedia.com/entry/cooper_edmund
- Cooper, Elspeth (1968- ) (stories) (assoc.)
- See elspethcooper.com/blog/about
- Cooper, Gary (1901-1961) (stories) (assoc.)
- See en.wikipedia.org/wiki/Gary_Cooper
- Cooper, George (1840-1927) (stories)
- See en.wikipedia.org/wiki/George_Cooper_(poet)
- Cooper, Giles (Stannus) (1918-1966) (stories)
- See www.sf-encyclopedia.com/entry/cooper_giles
- Cooper, Gladys (Constance) (1888-1971) (stories) (assoc.)
- See en.wikipedia.org/wiki/Gladys_Cooper
- Cooper, H. S. (fl. 1890s-1920s) (stories)
- Explorer. Born in the Isle of Wight, England; lived in Texas.
- Cooper, James (fl. 2000s-2010s) (stories) (assoc.)
- See www.jamescooperfiction.co.uk
- Cooper, James Fenimore (1789-1851) (stories) (assoc.)
- See en.wikipedia.org/wiki/James_Fenimore_Cooper
- Cooper, Jared W. (fl. 2010s) (stories)
- See jaredwcooper.com
- Cooper, Jean B. (fl. 1990s-2010s) (stories)
- See jeanbcooper.wordpress.com/about
- Cooper, Karina (fl. 2010s) (stories)
- See www.goodreads.com/author/show/4417841.Karina_Cooper
- Cooper, L. Andrew (fl. 2010s) (stories)
- See landrewcooper.com