- Cores, Lucy [i.e., Lucy Michaela Cores Kortchmar] (1912-2003) (stories)
- Born in Moscow; came to the U.S. as a child; graduated from Barnard College; graphic artist and book illustrator; lived in NYC and on Marthas Vineyard.
- Corey, James S. A.; pseudonym of Daniel Abraham (1969- ) & Ty Franck (1969- ) (stories) (assoc.)
- See en.wikipedia.org/wiki/James_S._A._Corey
- Corey, Paul (Frederick) (1903-1992) (stories)
- See www.sf-encyclopedia.com/entry/corey_paul
- Corley, Edwin (Raymond) (1931-1981) (stories)
- See www.sf-encyclopedia.com/entry/corley_edwin
- Corley, James (1947- ) (stories)
- See www.sf-encyclopedia.com/entry/corley_james
- Corliss, William R. (1926-2011) (stories) (assoc.)
- See en.wikipedia.org/wiki/William_R._Corliss
- Cormick, Craig (1961- ) (stories)
- See en.wikipedia.org/wiki/Craig_Cormick
- Cornell, Charles A. (1967-2019) (stories)
- See www.charlesacornell.com
- Cornell, Paul (1967- ) (stories) (assoc.)
- See www.sf-encyclopedia.com/entry/cornell_paul
- Cornwell, John (1940- ) (stories) (assoc.)
- See en.wikipedia.org/wiki/John_Cornwell_(writer)
- Corpora, Joey (fl. 2010s) (stories)
- See www.imdb.com/name/nm4956779
- Corradi, Matthew (fl. 2000s-2010s) (stories)
- See www.lightspeedmagazine.com/authors/matthew-corradi/
- Correa, Hugo (1926-2008) (stories)
- See www.sf-encyclopedia.com/entry/correa_hugo
- Correia, Larry (1977- ) (stories) (assoc.)
- See en.wikipedia.org/wiki/Larry_Correia
- Correll, A(ugustus) Boyd (1905-1987) (stories)
- Born in South Carolina; Newspaperman, writer for Walt Disney, author of magazine short stories; died in Los Angeles.
- Corvin, Blaise (fl. 2010s) (stories) (assoc.)
- See www.goodreads.com/author/show/15845960.Blaise_Corvin
- Corvus, Denis (fl. 2010s) (stories) (assoc.)
- See dantecyberman.deviantart.com
- Corwin, Aaron (fl. 2010s) (stories)
- See us.macmillan.com/author/aaroncorwin#
- Cory, Howard L.; pseudonym of Jack Jardine (1931-2009) & Julie Ann Jardine (1926-2012) (stories) (assoc.)
- See www.sf-encyclopedia.com/entry/cory_howard_l
- Coscarelli, Don (1954- ) (stories) (assoc.)
- See en.wikipedia.org/wiki/Don_Coscarelli
- Cosh, E. G. (fl. 2010s) (stories)
- See egcosh.com
- Costa, Margaret Jull (1949- ) (stories) (assoc.)
- See en.wikipedia.org/wiki/Margaret_Jull_Costa
- Costa, Paul Edward (fl. 2010s) (stories)
- See paperback-press.com/paul-edward-costa/
- Costello, John (H.) (1948-2015) (stories) (assoc.)
- See ccbfuneral.com/?p=2909
- Costello, Matthew J(ohn) (1948- ) (stories) (assoc.)
- See www.sf-encyclopedia.com/entry/costello_matthew_j
- Costello, P. F.; house pseudonym (fl. 1940s-1950s) (stories)
- See www.sf-encyclopedia.com/entry/costello_p_f
- Costikyan, Greg(ory John) (1959- ) (stories) (assoc.)
- See www.sf-encyclopedia.com/entry/costikyan_greg
- Cotronis, George (1985- ) (stories) (art)
- See www.ravenkult.com
- Cotterill, Steve (fl. 2010s) (stories)
- See shoresofnight.blogspot.co.uk
- Cottier, P(enelope) S(usan) (fl. 2000s-2010s) (stories)
- See pscottier.com
- Cottrell, Leonard (Eric) (1913-1974) (stories) (assoc.)
- See en.wikipedia.org/wiki/Leonard_Cottrell
- Coughlin, John A(lbert) (1885-1965) (art)
- See pulpartists.com/Coughlin.html
- Coulson, Juanita (Ruth, née Wellons) (1933- ) (stories) (art) (assoc.)
- See www.sf-encyclopedia.com/entry/coulson_juanita
- Coulson, Robert (Stratton) (1928-1999) (stories) (assoc.)
- See www.sf-encyclopedia.com/entry/coulson_robert
- Coulthart, Rebecca (fl. 2010s) (art)
- See www.batterypoweredpotato.deviantart.com
- Counihan, Deirdre (fl. 1990s-2010s) (stories) (art) (assoc.)
- See dcounihan.com
- Counter, Ben (fl. 1990s-2010s) (stories) (assoc.)
- See www.sf-encyclopedia.com/entry/counter_ben
- Cournos, Helen Sybil Norton Kestner (1893-1959) (stories)
- She was married to John Cournos, but before that to Harry Nelson Atwood and Alfred W. Satterthwaite; most records do not include her Sybil Norton middle names.
- Cournos, John [born Ivan Grigorievich Korshun] (1881-1966) (stories) (assoc.)
- Husband of Helen Sybil Norton Kestner Cournos.
- Cousins, Norman (1915-1990) (stories)
- See en.wikipedia.org/wiki/Norman_Cousins
- Couturier, Scott J. (fl. 2010s) (stories)
- See scottjcouturier.blogspot.com
- Couvillier, Willis (E.) (1959- ) (stories)
- See will-couvillier.livejournal.com
- Couzens, Gary (1964- ) (stories) (assoc.)
- See www.sf-encyclopedia.com/entry/couzens_gary
- Cover, Arthur Byron (1950- ) (stories) (assoc.)
- See www.sf-encyclopedia.com/entry/cover_arthur_byron
- Covey, Stephen D. (fl. 2010s) (stories)
- See www.stephendcovey.com
- Coville, Bruce (Farrington) (1950- ) (stories) (assoc.)
- See www.sf-encyclopedia.com/entry/coville_bruce
- Cowdrey, Albert E. (1933- ) (stories)
- See www.sf-encyclopedia.com/entry/cowdrey_albert_e
- Cowley, Meg (fl. 2010s) (stories)
- See megcowley.com
- Cowper, Richard; pseudonym of John Middleton Murry (1926-2002) (stories) (assoc.)
- See www.sf-encyclopedia.com/entry/cowper_richard
- Cox, Cardinal (fl. 1990s-2010s) (stories)
- See atlanteanpublishing.wikia.com/wiki/Cardinal_Cox
- Cox, Edward (fl. 2000s-2010s) (stories) (assoc.)
- See edwardcox.net
- Cox, F. Brett (fl. 1990s-2010s) (stories)
- See litreactor.com/team/f-brett-cox
- Cox, (William) Greg(ory) (1959- ) (stories)
- See www.sf-encyclopedia.com/entry/cox_greg
- Cox, Joan (Irene) (1942- ) (stories) (assoc.)
- See www.sf-encyclopedia.com/entry/cox_joan
- Cox, Mark (1956- ) (stories)
- See en.wikipedia.org/wiki/Mark_Cox_(poet)
- Cox, William R(obert) (1901-1988) (stories)
- Writer of westerns and mystery novels. Born in Peapack, New Jersey; died in Los Angeles, California.
- Coxon, Dan (fl. 1990s-2010s) (stories)
- See www.goodreads.com/author/show/5347096.Dan_Coxon
- Coye, Lee Brown (1907-1981) (stories) (art) (assoc.)
- See pulpartists.com/Coye.html
- Coyle, Harold (William) (1952- ) (stories) (assoc.)
- See www.sf-encyclopedia.com/entry/coyle_harold_w
- Coyle, T. Thorn [born Theresa Dutton] (1965- ) (stories)
- See en.wikipedia.org/wiki/T._Thorn_Coyle
- Crabapple, Molly (1983- ) (art)
- See en.wikipedia.org/wiki/Molly_Crabapple
- Crackanthorpe, Hubert M(ontague) (1870-1896) (stories) (assoc.)
- Born Hubert Cookson but name changed for legal purposes; son of a Queens Counsel and writer on feminist topics; died a suicide in Paris.
- Craig, David; pseudonym of James Tucker (1929- ) (stories)
- See www.sf-encyclopedia.com/entry/craig_david
- Craigie, D. W. (fl. 2010s) (stories)
- See dwcraigie.com
- Craigie, (Henry) Hamilton (1880-1956) (stories)
- Born in Connecticut; died in Florida; prolific pulp writer.
- Crais, Robert (Kyle) (1953- ) (stories) (assoc.)
- See en.wikipedia.org/wiki/Robert_Crais
- Cramer, John G(leason, Jr.) (1934- ) (stories) (assoc.)
- See www.sf-encyclopedia.com/entry/cramer_john
- Cramer, Kathryn (Elizabeth) (1962- ) (stories) (assoc.)
- See www.sf-encyclopedia.com/entry/cramer_kathryn
- Crandall, Bruce; pseudonym (stories)
- of Walter B. Gibson or Ed Burkholder.
- Crandall, Jeff (fl. 2010s) (stories)
- See www.monamuseum.org/artist/jeff-crandall
- Crane, Burton (1901-1963) (stories)
- Born in Buffalo, New York, and educated at Princeton; financial editor of the Japan Advisor in Tokyo; playwright, author, teacher and singer.
- Crane, Robert; pseudonym of Bernard Glemser (1908-1990) (stories) (assoc.)
- See www.sf-encyclopedia.com/entry/crane_robert
- Crane, Zaslow (fl. 2010s) (stories)
- See zaslowcrane.com
- Crankshaw, Donald S. (fl. 2000s-2010s) (stories)
- See www.donaldscrankshaw.com
- Cranmer, David (fl. 2000s-2010s) (stories)
- See www.davidcranmer.com
- Cranor, Jeffrey (fl. 2000s-2010s) (stories) (assoc.)
- See happierman.net
- Craven, Sean (fl. 2000s-2010s) (stories)
- See seancraven.blogspot.co.uk
- Craven, Wes [i.e., Wesley Earl Craven] (1939-2015) (stories) (assoc.)
- Humanities professor turned film director and screenwriter.
- Cravens, (Astrid) Gwyneth (1944- ) (stories)
- See www.sf-encyclopedia.com/entry/cravens_gwyneth
- Crawford, Anne [i.e., Anne Crawford, Baroness von Rabe] (1846-1912) (stories)
- See www.victorianresearch.org/atcl/show_author.php?aid=2629
- Crawford, F(rancis) Marion (1854-1909) (stories) (assoc.)
- Sister of Anne Crawford.
- Crawford, William L(evi) (1911-1984) (stories) (assoc.)
- See www.sf-encyclopedia.com/entry/crawford_william_l
- Crâznic, Oliviu (1978- ) (stories)
- See ro.wikipedia.org/wiki/Oliviu_Cr%C3%A2znic
- Creasey, John (1908-1973) (stories) (assoc.)
- See en.wikipedia.org/wiki/John_Creasey
- Creek, David J. (fl. 1980s-2010s) (stories) (assoc.)
- See davecreek.net
- Creese, Irene (Lilian) (1911-1993) (stories)
- Stage and film actress turned writer. Married George Posford in 1936, then George St. John Brodrick, 2nd Earl of Midleton, in 1975, so becoming Countess of Midleton.
- Cresswell, Mary (1937- ) (stories)
- See www.bookcouncil.org.nz/writers/cresswellmary.html#a958
- Crichton, (John) Michael (1942-2008) (stories) (assoc.)
- See en.wikipedia.org/wiki/Michael_Crichton
- Crighton, Katherine (fl. 2010s) (stories)
- See saltsilverandblood.tumblr.com
- Crilley, Mark (1965- ) (stories) (art) (assoc.)
- See www.sf-encyclopedia.com/entry/crilley_mark
- Crilly, Brandon (fl. 2000s-2010s) (stories)
- See brandoncrilly.wordpress.com
- CrimethInc.; pseudonym (fl. 2000s) (stories)
- See www.crimethinc.com
- Crisp, Steven (fl. 1980s-2000s) (art)
- See crispart.co.uk
- Crispin, A(nn) C(arol) [born Ann Carol Tickell] (1950-2013) (stories) (assoc.)
- See www.sf-encyclopedia.com/entry/crispin_a_c
- Crispin, Edmund; pseudonym of Robert Bruce Montgomery (1921-1978) (stories) (assoc.)
- See en.wikipedia.org/wiki/Edmund_Crispin
- Crist, Kenneth James [born Kenneth James Goss] (1944- ) (stories) (assoc.)
- See www.bewilderingstories.com/bios/crist.html
- Crist, Vonnie Winslow (fl. 1980s-2010s) (stories) (art)
- See vonniewinslowcrist.com
- Criswell [i.e., Jeron Criswell King, born Jeron Criswell Konig] (1907-1982) (stories) (assoc.)
- See en.wikipedia.org/wiki/The_Amazing_Criswell
- Crivilare, Gabriella (fl. 2010s) (stories)
- See gabriellacrivilare.wordpress.com
- Croe, Michaela (fl. 1990s) (stories)
- See michaelacroe.wordpress.com