- Cabell, James Branch
- Caldecott, Moyra
- Callander, Don
- Canavan, Trudi
- Card, Orson Scott
- Cardarelle, Andria
- Carey, Jacqueline
- Carl, Lillian Stewart
- Carlsen, Chris
- Carlyon, Richard
- Carmody, Isobelle
- Carroll, Jerry Jay
- Carroll, Susan
- Carter, Lin
- Cary, Devin
- Caspian, Jonatha Ariadne
- Chadbourn, Mark
- Chalker, Jack L.
- Chant, Joy
- Chamberlin, Ann
- Chapman, Vera
- Charnas, Suzy McKee
- Charrette, Robert N.
- Chernenko, Dan
- Cherryh, C. J.
- Chester, Deborah
- Chetwin, Grace
- Chilson, Rob
- Chin, M. Lucie
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- Chinn, Mike
- Chippindale, Peter
- Chopra, Deepak
- Christian, Deborah
- Ciencin, Scott
- Claremont, Chris
- Clark, Douglas W.
- Clayton, Jo
- Clemens, James
- Clough, Brenda W.
- Cobley, Michael
- Cochran, Molly
- Cockayne, Steve
- Coe, David B.
- Coe, Ross Anton
- Cole, Adrian
- Cole, Allan
- Cole, Damaris
- Coleman, Loren L.
- Collins, Paul
- Coney, Michael Greatrex
- Connors, William W.
- Constantine, Storm
- Cook, David
- Cook, Dawn
- Cook, Glen
- Cook, Hugh
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- Cook, Monte
- Cook, Rick
- Cooke, Catherine
- Cooper, Louise
- Cooper, Susan
- Corby, Adam
- Corran, Mary
- Costello, Matthew J.
- Costikyan, Greg
- Coulson, Juanita
- Coville, Bruce
- Cowper, Richard
- Craig, Brian
- Crawford, Dan
- Crawford, F. Marion
- Cray, Roberta
- Creighton, Lee
- Crenshaw, Nadine
- Crocco, Kyle
- Crompton, Anne Eliot
- Crook, Jeff
- Cross, Ronald Anthony
- Cross, Tom
- Crowley, John
- Cunningham, Elaine
- Cusack, Louise
- Cushman, Carolyn
- Cutter, Leah R.
- Cymri, Chrys
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