- Clare, Kelli (fl. 2010s) (stories)
- See kelliclare.com
- Claremont, Chris(topher Simon) (1950- ) (stories) (assoc.)
- See www.sf-encyclopedia.com/entry/claremont_chris
- Clareson, Thomas D(ean) (1926-1993) (stories) (assoc.)
- See www.sf-encyclopedia.com/entry/clareson_thomas_d
- Claretie, Jules [i.e., Arsène Arnaud Claretie] (1840-1913) (stories)
- See www.sf-encyclopedia.com/entry/claretie_jules
- Claribel; pseudonym of Charlotte Alington Barnard (1830-1869) (stories)
- See en.wikipedia.org/wiki/Charlotte_Alington_Barnard
- Clark, Al(bert) W(illiam) (1886-1984) (stories)
- Born in Pittsfield, Massachusetts; died in Iowa.
- Clark, [Sir] Andrew (, 1st Baronet) (1826-1893) (stories) (assoc.)
- See en.wikipedia.org/wiki/Sir_Andrew_Clark,_1st_Baronet
- Clark, Andy (fl. 2000s-2010s) (stories)
- See workshopshed.com
- Clark, (Charles) Badger, Jr. (1883-1957) (stories)
- See www.historynet.com/requiem-cowboy-poet.htm
- Clark, Benton (Henderson) (1895?-1964) (stories) (art) (assoc.)
- Born and died in Coshocton, Ohio. Birthdate also given as 1900.
- Clark, C. L. (fl. 2010s) (stories)
- See adarknessrevealed.com
- Clark, Charles (fl. 1910s-1930s) (stories)
- See www.sf-encyclopedia.com/entry/clark_charles
- Clark, Ellery H(arding) (1874-1949) (stories)
- Born in West Roxbury, Mass.; educated at Harvard University; lawyer and author.
- Clark, F(rederick) Le Gros (1892-1977) (stories)
- See www.sf-encyclopedia.com/entry/clark_f_le_gros
- Clark, Finn(ian) (1990-2015) (stories) (art) (assoc.)
- See www.standard.co.uk/news/london/body-found-in-search-for-vulnerable-missing-londoner-finnian-clark-a3131796.html
- Clark, George Makana (fl. 1990s-2000s) (stories) (assoc.)
- See en.wikipedia.org/wiki/George_Makana_Clark
- Clark, John R. (1948- ) (stories)
- See sennebec.livejournal.com/profile
- Clark, Lawrence Gordon (fl. 1970s-2010s) (stories)
- See en.wikipedia.org/wiki/Lawrence_Gordon_Clark
- Clark, Lechmere Worrall (1875-1957) (stories)
- Born in Bristol, England; studied medicine in London; playwright.
- Clark, Mabel Margaret Cowie (1898-1975) (stories)
- Born in Maud, Aberdeenshire, Scotland; died in London, England; journalist, playwright.
- Clark, Margaret Goff (1913-2004) (stories)
- See www.sf-encyclopedia.com/entry/clark_margaret_goff
- Clark, (Helen) Marguerite (1883-1940) (stories)
- See en.wikipedia.org/wiki/Marguerite_Clark
- Clark, Mark W(ayne) (1896-1984) (stories)
- See en.wikipedia.org/wiki/Mark_W._Clark
- Clark, P(henderson) Djèlí (1971- ) (stories) (assoc.)
- See www.fantasticfiction.com/c/p-djeli-clark/
- Clark, Patricia Denise (née Robins) (1921- ) (stories)
- See en.wikipedia.org/wiki/Patricia_Robins
- Clark, Philip (1907-1975) (stories) (assoc.)
- Raised in Plainfield, New Jersey; with the counter intelligence corps in WWII; lived in Charleston, West Virginia; died in Swannanoa, North Carolina.
- Clark, Potsy [i.e., George M. Clark] (1894-1972) (stories)
- See en.wikipedia.org/wiki/George_Clark_(American_football_coach)
- Clark, Ronald W(illiam) (1916-1987) (stories)
- See www.sf-encyclopedia.com/entry/clark_ronald_w
- Clark, Stuart (fl. 1990s-2010s) (stories)
- See en.wikipedia.org/wiki/Stuart_Clark_(author)
- Clark, Tiana (fl. 2010s) (stories)
- See en.wikipedia.org/wiki/Tiana_Clark
- Clark, Tom (1941-2018) (stories) (art)
- See en.wikipedia.org/wiki/Tom_Clark_(poet)
- Clark, Valma (1894-1953) (stories)
- See tellersofweirdtales.blogspot.co.uk/2014/10/valma-clark-1894-1953.html
- Clark, [Sir] W(ilfrid) E(dward) Le Gros (1895-1971) (stories) (assoc.)
- See en.wikipedia.org/wiki/Wilfrid_Le_Gros_Clark
- Clark, William (Donaldson) (1916-1985) (stories)
- See www.sf-encyclopedia.com/entry/clark_william
- Clark, Willis Gaylord (1808-1841) (stories)
- See en.wikipedia.org/wiki/Willis_Gaylord_Clark
- Clarke, A(ubrey) Vincent (1922-1998) (stories)
- See www.sf-encyclopedia.com/entry/clarke_a_v
- Clarke, [Sir] Andrew (1824-1902) (stories) (assoc.)
- See en.wikipedia.org/wiki/Andrew_Clarke_(British_Army_officer)
- Clarke, Arthur C(harles) (1917-2008) (stories) (assoc.)
- See en.wikipedia.org/wiki/Arthur_C._Clarke
- Clarke, C(harles) Langton (1857-1936) (stories)
- Editor, journalist and engineer. Born in England; died in Toronto, Canada.
- Clarke, [Sir] Caspar Purdon (1846-1911) (stories)
- See en.wikipedia.org/wiki/Caspar_Purdon_Clarke
- Clarke, Coral (fl. 1970s) (stories)
- Wife of Robert Jackson.
- Clarke, Donald Henderson (1887-1958) (stories)
- See bearalley.blogspot.co.uk/2011/01/donald-henderson-clarke.html
- Clarke, [Sir] Edward (George) (1841-1931) (stories) (assoc.)
- See en.wikipedia.org/wiki/Edward_Clarke_(barrister)
- Clarke, (John) Emery (1911-1990) (art)
- See pulpartists.com/Clarke.html
- Clarke, Finn (fl. 2010s) (stories)
- See www.finnclarke.com
- Clarke, Florence Standish [Mrs. David D. Clarke] (1886-1964) (stories)
- See www.findagrave.com/memorial/147622582/florence-clarke
- Clarke, Fred (1921-2013) (stories) (art)
- See www.bis-space.com/2013/04/24/9969/fred-clarke-1921-%E2%80%93-2013-a-perfect-gentleman
- Clarke, (James) Hamilton (Siree) (1840-1912) (stories)
- See en.wikipedia.org/wiki/Hamilton_Clarke
- Clarke, Herbert Edwin (1852-1912) (stories)
- See www.bartleby.com/223/0658.html
- Clarke, I(gnatius) F(rederic) Ian (1918-2009) (stories) (assoc.)
- See www.sf-encyclopedia.com/entry/clarke_i_f
- Clarke, J(ames) Brian (1928- ) (stories) (assoc.)
- See www.sf-encyclopedia.com/entry/clarke_j_brian
- Clarke, James (fl. 1970s-2000s) (stories)
- See www.overdrive.com/creators/427739/james-clarke
- Clarke, James Freeman (1810-1888) (stories) (assoc.)
- See en.wikipedia.org/wiki/James_Freeman_Clarke
- Clarke, James Mitchell (1903- ) (stories)
- Writer. Born in Miles City, Montana; went west to California.
- Clarke, John Henrik [born John Henry Clark] (1915-1998) (stories)
- See en.wikipedia.org/wiki/John_Henrik_Clarke
- Clarke, Joseph I(gnatius) C(onstantine) (1846-1927) (stories)
- See en.wikipedia.org/wiki/Joseph_Ignatius_Constantine_Clarke
- Clarke, Josephine Fitzgerald (1866-1953) (stories)
- Born Josephine Fitzgerald Moylan in Galway, Ireland; married Sir Frederick W.A. Clarke in 1893.
- Clarke, Kenneth B. (fl. 1910s-1920s) (stories)
- Not to be confused with the American engineer (1901-1960).
- Clarke, Laurence (Ayscough Boland) (1873-1942) (stories)
- Born in Wolverhampton, Staffordshire, England. Name once given as Lawrence Clarke Boland Ayscough (!), in immigration registration on island of Jersey.
- Clarke, Liz (fl. 2000s) (stories) (art) (assoc.)
- See www.lizclarke.co.uk
- Clarke, M(aria) E(lvins) Moma (née Pountney) (1869-1958) (stories)
- See en.wikipedia.org/wiki/Moma_Clarke
- Clarke, Marcus (Andrew Hislop) (1846-1881) (stories) (assoc.)
- See en.wikipedia.org/wiki/Marcus_Clarke
- Clarke, Mary Bayard (Devereux) (1827-1886) (stories)
- See www.ncpedia.org/biography/clarke-mary
- Clarke, Neil (1966- ) (stories) (assoc.)
- See en.wikipedia.org/wiki/Neil_Clarke_(editor)
- Clarke, Neva (Yvonne) [i.e., Neva Clarke McKenna] (1920- ) (stories)
- New Zealand author.
- Clarke, Percy A(rthur) (1895-1974) (stories)
- See www.sf-encyclopedia.com/entry/clarke_percy
- Clarke, Powhatan (Henry), U.S.A. (1862-1893) (stories)
- See en.wikipedia.org/wiki/Powhatan_Henry_Clarke
- Clarkson, Ben (fl. 2010s) (art)
- See www.thebenclarkson.com
- Clarkson, Willy (1861-1934) (stories)
- See en.wikipedia.org/wiki/Willy_Clarkson
- Clason, Clyde B(urt) (1903-1987) (stories) (assoc.)
- Born in Denver; an advertising copywriter in Chicago, trade paper editor, and public relations manager.
- Claudel, Philippe (1962- ) (stories)
- See en.wikipedia.org/wiki/Philippe_Claudel
- Claudy, Carl H(arry) (1879-1957) (stories) (assoc.)
- See www.sf-encyclopedia.com/entry/claudy_carl_h
- Clausen, Carl (1885-1954) (stories)
- Born in Denmark; he was a sailor, miner, pearl-fisher, life insurance salesman, window cleaner, lumber jack, copra trader and opera singer before turning to writing; came to the U.S. in 1906 knowing practically no English; died in Delaware Water Gap, Pennsylvania.
- Clausen, Daniel (fl. 2000s-2010s) (stories)
- See ghostsofnagasaki.com/
- Clauser, Grant (fl. 2010s) (stories)
- See uniambic.com
- Claussen, W(illiam) Edmunds (1907-1974) (stories)
- See bearalley.blogspot.co.uk/2016/10/w-edmunds-claussen.html
- Clavelli, Tony (fl. 2010s) (stories)
- See www.tonyclavelli.com
- Claxton, Adelaide (Sophia) (1841-1927) (stories) (art)
- See en.wikipedia.org/wiki/Adelaide_Claxton
- Claxton, Hasani (fl. 2010s) (art)
- See www.hasaniclaxton.com
- Clay, Charles (1906-1980) (stories)
- See www.collectionscanada.gc.ca/literaryarchives/027011-200.030-e.html
- Clay, Henry (1777-1852) (stories) (assoc.)
- See en.wikipedia.org/wiki/Henry_Clay
- Clay, Kat (fl. 2010s) (stories)
- See www.katclay.com
- Clay, Robert (Henry Keating) (1889-?) (stories)
- Born in Killiney, Dublin, Ireland; lived in Vancouver, Canada; death not traced, but probably in Canada.
- Claybourne, Z. Z.; pseudonym of C. E. Young (fl. 2010s) (stories)
- See writeonrighton.com
- Clayden, Arthur W. (fl. 1900s) (stories)
- Principal of the Royal Albert Memorial College, Exeter, England.
- Clayton, (Patricia) Jo (1939-1998) (stories) (assoc.)
- See www.sf-encyclopedia.com/entry/clayton_jo
- Clayton, John J(acob) (1935- ) (stories)
- See www.johnjclayton.com/
- Cleator, P(hilip) E(llaby) (1908-1994) (stories) (assoc.)
- See www.bis-space.com/what-we-do/the-british-interplanetary-society/history/philip-e-cleator
- Clee, Mona A(nn) (1952- ) (stories) (assoc.)
- See www.sf-encyclopedia.com/entry/clee_mona_a
- Cleese, John (Marwood) (1939- ) (stories)
- See en.wikipedia.org/wiki/John_Cleese
- Clegg, Jaleta (fl. 2000s-2010s) (stories)
- See jaletaclegg.wix.com/jaletacleggauthor
- Clegg, Thomas Bailey (1857-1945) (stories)
- Born in Ballarat, Victoria, Australia. Journalist, lawyer, police magistrate and editor in Australia.
- Cleghorn, Sarah Norcliffe (1876-1959) (stories) (art)
- See en.wikipedia.org/wiki/Sarah_Norcliffe_Cleghorn
- Cleland, Jane K. (fl. 2000s-2010s) (stories)
- See en.wikipedia.org/wiki/Jane_K._Cleland
- Cleland, R(obert) (fl. 1880s) (stories)
- A Scottish novelist.
- Clemenceau, Georges (Eugene Benjamin) (1841-1929) (stories) (assoc.)
- See en.wikipedia.org/wiki/Georges_Clemenceau
- Clemens, Brian (Horace) (1931-2015) (stories) (assoc.)
- See en.wikipedia.org/wiki/Brian_Clemens