- Capital Times (Madison, Wis.)1
- Carnegie Commission on Educational Television1
- Carnegie Corporation of New York15,815
- Carnegie Council on Adolescent Development3
- Carnegie Council on Ethics & International Affairs2
- Carnegie Endowment for International Peace28
- Carnegie Foundation for the Advancement of Teaching8
- Carnegie, Andrew, 1835-19191,156
- Carnegie, Louise Whitfield, 1857-19464
- Carnegie-Mellon University1
- Carnesale, Albert1
- Carter, Ashton B.1
- Carter, Elmer A. (Elmer Anderson), 1890-19731
- Carter, Jimmy, 1924-2
- Cartter, Allan M. (Allan Murray), 1922-19761
- Cartwright, Morse A. (Morse Adams), 1890-13
- Castle, Alfred Watkins, 1885-19643
- Cayton, Horace R. (Horace Roscoe), 1903-197027
- Center for Applied Linguistics1
- Center for Community Change1
- Center for Defense Information (Washington, D.C.)3
- Center for Population Options (U.S.)1
- Charles, Bernard L1
- Charnley, Susan1
- Chaskalson, Arthur1
- Chauncey, Henry, 1905-20021
- Chayes, Antonia Handler, 1929-1
- Chernstrom, Dora1
- Child Care Partnership Project (U.S.)1
- Children's Defense Fund (U.S.)3
- Children's Television Workshop1
- Chisolm, Elwood1
- Christopher, Warren1
- Church Peace Union1
- Cicerone, Ralph J1
- Clark, Dick, 1928-1
- Clark, John Bates, 1847-19381
- Clark, Kenneth Bancroft, 1914-20051
- Clark, Mary Marshall13
- Clarke, Daniel P.6
- Clarke, Eric, 1890-19681
- Clay, Emily H.6
- Clinton, Bill, 1946-1
- Clinton, Hillary Rodham1
- Cobb, W. Montague (William Montague), 1904-19903
- Cole, Stewart G. (Stewart Grant), 1892-19802
- Colean, Miles Lanier, 1898-19801
- Collins, Edward H.1
- Columbia Broadcasting System, inc.3
- Columbia University3
- Columbia University. Oral History Research Office1
- Columbus Council for Democracy1
- Comedy Central (Firm)1
- Comer, James P1
- Commercial Appeal Newspaper. Memphis3
- Commission on Interracial Cooperation1
- Committee to Bridge the Gap (Los Angeles, Calif.)1
- Commonweal Foundation1
- Communications Consortium Media Center1
- Community Television Foundation of South Florida3