Names
- Chicago, Milwaukee and St. Paul Railway Company.1
- Chicago, Peoria and St. Louis Railroad Company of Illinois.1
- Clark, Frederick Converse1
- Clark, Frederick Converse.1
- Clark, John Bates, 1847-1938.1
- Clements, William L. (William Lawrence), 1861-1934.1
- Cleveland, Cincinnati, Chicago, and St. Louis Railway Company.1
- Codd, George Pierre, 1869-1927.1
- Colorado and Southern Railway.1
- Commons, John Rogers, 1862-1945.1
- Comstock, William Alfred, 1877-1949.1
- Conant, Charles A. (Charles Arthur), 1861-1915.1
- Cooley, Charles Horton, 1864-1929.1
- Cooley, Lyman Edgar, 1850-1917.1
- Cooley, Thomas McIntyre, 1824-1898.1
- Coolidge, Calvin, 1872-1933.1
- Cornell University1
- Cotter, William Edward, 1893-1957.1
- Couzens, James, 1872-1936.1
- Curtis, Charles.1