- Clinton, George, 1739-181278
- Clinton, Henry, 1771-18291
- Clinton, James, 1736-18121
- Clinton, William Henry2
- Clowes, Timothy, 1787-18471
- Coats, David1
- Cobb, David, 1748-18301
- Cochran, Captain1
- Cockle, John1
- Codbec, Jacob1
- Colbrath, William1
- Colden, Cadwallader D. (Cadwallader David), 1769-18343
- Coleman, William, 1766-18293
- Collet, Guy1
- Collins, John, -17958
- Colomb, Peter1
- Colquhoun, Patrick, 1745-18201
- Comission to negotiate with Spain1
- Commanding Officer at Elizabeth Town1
- Commissary of Officers1
- Commission3
- Commissioners of Indian Affairs, Northern Department2
- Commissioners of the Treasury2
- Committee for Foreign Affairs2
- Committee for manumitting Slaves1
- Committee of Federal Freeholders1
- Committee of Secret Correspondence1
- Committee on Foreign Affairs2
- Congress (English translation)1
- Connecticut. Governor15
- Consuls of the United States abroad1
- Cooley, John1
- Cooper, William1
- Corbin, Mr.1
- Cornelissen, Marten1
- Corse, Benjamin1
- Cosine, John1
- Council of Appointment1
- Council of Foreign Affairs1
- Council of Massachusetts4
- Court of St. James1
- Coutinho, Diego Forjas, Governor of Madeira1
- Coxe, Colonel2
- Coxe, Daniel, 1741-18261
- Coxe, Tench, 1755-18244
- Coxe, William, Jr.1
- Cozine, John1
- Cozine, Oliver L.1
- Crane, Josiah1
- Crawford, James1
- Crawfurd, James, Gov.1
- Crawley, Mr.1
- Creighton, James, 1736-18191
- Crocco, Giacomo Francisco3
- Crommelin, Messrs.1
- Crosses, de1
- Cruger, Harriet1
- Cruger, Nicholas, 1743-18001
- Crummell, Alexander, 1819-18981
- Cunningham, Ephraim May, 1792-18521