- 6 Cohn, Arthur, 1910-1998
- 9 Cohocksink Creek, Pennsylvania
- 8 Coins
- 1 Colb & Sheetz Lumber Yard
- 1 Colburn & Co. Spice Mill
- 2 Colburn, Henry, d. 1855
- 3 Cold
- 3 Cold (Sculpture)
- 2 Cold cutting
- 3 Cold snap
- 2 Cold Spring Ice Company
- 3 Cold storage rooms
- 6 Colden, David
- 3 Colden, Frances Wilkes, b. 1796?
- 2 Cole, Charles Augustus
- 2 Coles, John, 1749 or 1750-1809
- 2 Colgate & Company
- 1 Colladay & Hartley (Firm)
- 1 Colladay Building
- 29 Collages (visual works)
- 1 Collars (neckwear)
- 1 Collection bags
- 6 College administrators
- 8 College Avenue
- 1 College of Shorthand and Typewriting
- 30 College of the City of New York
- 1 College presidents
- 17 Colleges
- 1 Collegiate Gothic
- 1 Collegiate School & Dancing Academy
- 1 Collieries
- 2 Colliers
- 1 Collingdale, Pennsylvania
- 2 Collins & Co.
- 1 Collins' Factory
- 1 Collins Printing House
- 1 Collins, A.M. Manufacturing Co.
- 5 Collins, Charles Allston, 1828-1873
- 1 Collins, Miss, of Broadstairs
- 17 Collins, Wilkie, 1824-1889
