Encyclopedias, Almanacs, Transcripts, and Maps
- Clifford, Nathan (1803–1881)
- Clinton v. Jones 520 U.S. 681 (1997)
- Clinton, William Jefferson (1946–)
- Clymer, George (1739–1813)
- Coast Guard (USCG), United States
- Cochran v. Louisiana 281 U.S. 370 (1930)
- Codes, Fast and Scalable Scientific Computation
- Codispoti v. Pennsylvania 418 U.S. 506 (1974)
- Cohen v. California 403 U.S. (1971)
- Cohen v. Cowles Media Co. 501 U.S. 663 (1991)
- Cohen, Morris R. (1880–1947)
- Cohens v. Virginia 6 Wheat. 265 (1821)
- Coke, Edward (1552–1634)
- Coker v. Georgia 433 U.S. 584 (1977)
- Colegrove v. Green 328 U.S. 549 (1946)
- Coleman v. Miller 307 U.S. 433 (1939)
- Colgate v. Harvey 296 U.S. 404 (1935)
- Collateral Attack
- Collector v. Day 11 Wallace 113 (1871)
- Collins v. City of Harker Heights 503 U.S. 115 (1992)