- Convict labor1
- Cook Engineering Laboratory (Clemson, S.C.)2
- Cooper, Harvie Hull, 1890-19678
- Cooper, Robert Muldrow, 1887-19661
- Cope Hall (Clemson, S.C.)9
- Corncribs1
- Cornerstone laying5
- Corridors2
- Covered bridges1
- Cox, Walter T. (Walter Thompson), 1918-20065
- Craig and Gaulden (Firm)1
- Crouch, Sydney James Leonhardt, 1889-19691
- Dairy Building (Clemson, S.C.)14
- Dairy barns6
- Dairy farms8
- Daniel Hall (Clemson, S.C.)25
- Daniel House (Clemson, S.C.)1
- Daniel, Charles E. (Charles Ezra), 1895-19641
- Davidson, A. Wolfe (Abraham Wolfe), 1903-19819
- Davis, Tracy1