- Carey, Mathew, 1760-18391
- Carez, J.1
- Case, J. M. (Julian M.), -1890, compiler1
- Chaffee, O. N. (Engineer)1
- Charle, Jean Baptiste Louis.1
- Chatelain, Zacharias.1
- Chicago Lithographing Co.1
- Chicago Sanitary District. Engineering Dept.1
- Chicago and North Western Railway Company1
- Chillas, David1
- Chovin, I. A., engraver1
- Claesz, Cornelis, approximately 1546-16091
- Clarke, W. B.1
- Collins, Jim, 1947-1
- Collot, Georges-Henri-Victor, 1750-1805, patron.1
- Colom, Arnold.1
- Colorado-Henkle Collection. IDeKN1
- Colton, G. Woolworth (George Woolworth), 1827-1901. General atlas1
- Conover, Allan D.1
- Cook, James, 1728-17791