| Author (number of quotes) | Description |
| Ca |
| Cabell, James Branch (1) | American author |
| Cabello, Camila (2) | Cuban-American singer and songwriter |
| Cabot, Meg (8) | American author |
| Caddy, Eileen (1) | founder of Findhorn Foundation |
| Caesar, Julius (2) | Roman strategist and politician |
| Cage, John (2) | American composer |
| Cage, Nicolas (1) | stage name of Nicolas Kim Coppola, American actor |
| Cain, David (2) | American author |
| Caldwell, Sarah (1) | American opera conductor, impresario, and stage director |
| Callaghan, James (1) | |
| Callas, Maria (1) | Greek-American operatic singer |
| Calvino, Italo (1) | Italian author |
| Cameron, William J. (1) | Journalist |
| Camp, Anna (1) | American actress and singer |
| Camp, Bill (1) | American actor |
| Campbell, Bebe Moore (1) | American author |
| Campbell, Joseph (6) | American author and scientist |
| Camus, Albert (18) | French author, philosopher |
| Canady, Charles T. (1) | American judge and lawyer |
| Canfield, Jack (3) | American author and motivational speaker |
| Cantor, Georg (2) | German mathematician |
| Capa, Robert (2) | Hungarian war photographer and photojournalist |
| Card, Orson Scott (9) | American author |
| Cardano, Girolamo (1) | Italian mathematician, physicist, doctor and astronomer |
| Carletti, Elio (1) | Italian painter |
| Carlin, George (7) | Comedian, actor, author |
| Carlyle, Thomas (6) | Scottish-born author and historian |
| Carnegie, Andrew (1) | Scottish-American industrialist, business magnate, and philanthropist |
| Carnegie, Dale (6) | American author |
| Carrel, Alexis (1) | French surgeon and biologist |
| Carroll, Lewis (6) | pen name of Charles Lutwidge Dodgson, English author and poet |
| Carson, Rachel (1) | |
| Carter-Scott, Cherie (3) | American author |
| Carver, George Washington (2) | American scientist |
| Cass, Kiera (2) | American author |
| Casson, Herbert (1) | Canadian journalist |
| Castillo, Ana (1) | |
| Cather, Willa (3) | American author |
| Cavendish, Margaret (1) | |
| Ce |
| Cecil, Richard (1) | |
| Cecil, William (1) | English statesman |
| Ch |
| Chakiris, George (1) | American dancer, actor and singer |
| Chalker, Jack L. (2) | |
| Chamfort, Nicolas (6) | French author |
| Chan, Jackie (1) | Hong Kong martial artist, actor, director, producer, stuntman, and singer |
| Chandler, Raymond (2) | American novelist |
| Chanel, Coco (9) | French fashion designer |
| Chang, Ruth (1) | American philosopher |
| Channing, William E. (1) | American preacher |
| Chapin, Edwin Hubbell (2) | American priest, author |
| Chaplin, Charlie (6) | English actor, director |
| Chatterton, Thomas (1) | English poet |
| Chbosky, Stephen (3) | American author, screenwriter and director |
| Chesterton, Gilbert Keith (2) | English author |
| Chi, Charlie (1) | |
| Chopin, Frédéric (1) | Polish composer |
| Chopra, Deepak (8) | American New Age guru |
| Christie, Agatha (18) | English author |
| Christina, Greta (17) | American author and activist |
| Churchill, Winston (20) | English politician, author |
| Ci |
| Cicero, Marcus Tullius (3) | Roman philosopher and politician |
| Cimorelli, Lisa (1) | American singer |
| Cl |
| Clancy, Tom (1) | American author |
| Clapton, Eric (1) | English guitarist, singer and composer |
| Clare, Cassandra (18) | pen name of Judith Rumelt, American-born author |
| Clark, Frank A. (2) | American editor |
| Clark, John Bates (1) | American economist |
| Clarke, Arthur Charles (7) | English author |
| Clarke, James Freeman (1) | American theologian and author |
| Cleaver, Eldridge (1) | American writer and political activist |
| Cleese, John Marwood (1) | English comedian, author and producer |
| Clegg, Brian (1) | English author |
| Clerk Maxwell, James (1) | Scottish mathematician and physicist |
| Clifford, William Kingdon (1) | English mathematician and philosopher |
| Climacus, John (1) | |
| Clinton, Hillary (1) | American politician and jurist |
| Clooney, George (1) | American actor, director, producer, and screenwriter |
| Co |
| Cobain, Kurt (8) | American musician |
| Cochran, Johnnie (3) | American lawyer |
| Cocteau, Jean (4) | French poet, author, painter, actor, composer and director |
| Coelho, Paulo (70) | Brazilian lyricist and novelist |
| Colbert, Stephen (1) | American comedian and author |
| Colby, Frank Moore (1) | American author, historian |
| Coleridge, Samuel Taylor (2) | |
| Colette, Sidonie-Gabrielle (1) | French author |
| Colfer, Eoin (1) | Irish author |
| Collins, Jason (1) | American basketball player |
| Collins, Joan (1) | English actress |
| Collins, John Churton (1) | English literary critic |
| Collins, Lily (1) | English-American actress and model |
| Collins, Suzanne (11) | American author |
| Colton, Charles Caleb (6) | English clergyman, author |
| Commoner, Barry (1) | American biologist |
| Confucius (6) | |
| Conklin, Robert (2) | American author |
| Conner, Bart (1) | |
| Connery, Sean (1) | Scottish actor |
| Connolly, Cyril Vernon (1) | English literary critic and writer |
| Conrad, Joseph (2) | Polish-born English author |
| Cooley, Charles Horton (1) | |
| Coolidge, Calvin (1) | the 30th President of the United States |
| Cooper, Alice (1) | American rock singer |
| Copperfield, David (1) | stage name of David Seth Kotkin, American magician |
| Corcoran, Barbara (1) | American businesswoman, investor, speaker, author, and TV personality |
| Cosby, Bill (6) | American actor and comedian |
| Cosgrove, Stephen (1) | American author |
| Coupland, Douglas (3) | Canadian novelist |
| Cousins, Norman (2) | American political journalist, author and professor |
| Cousteau, Jacques-Yves (1) | French naval officer, filmmaker, scientist and author |
| Covey, Stephen R. (4) | American author |
| Cowper, William (2) | English poet |
| Cr |
| Crawford, Chace (1) | American actor |
| Crawford, Joan (1) | American actress |
| Crescenzo, Luciano De (1) | Italian author, actor and director |
| Crichton, Michael (1) | |
| Crick, Francis (2) | British molecular biologist, biophysicist and neuroscientist |
| Critchlow, Stephen (1) | |
| Crosby, Bing (1) | American singer and actor |
| Cross, Marcia (1) | American actress |
| Crowe, Russell (1) | Australian actor |
| Crowley, Aleister (2) | English-born occultist, author |
| Cruise, Tom (1) | American actor and producer |
| Cruz, Penélope (1) | Spanish actress |
| Cruz, Ted (1) | American politician |
| Cs |
| Csokonai, Vitéz Mihály (4) | Hungarian poet |
| Cu |
| Culkin, Macaulay (2) | American actor |
| Cummings, Edward Estlin (2) | American author, poet, painter |
| Cuoco, Kaley (1) | American actress |
| Curie, Marie (1) | Polish-born French physicist |
| Currie, Cherie (8) | |
| Curtis, Jamie Lee (1) | American actress and author |
| Cussler, Clive (1) | American author |