- 1 Cochran, Thomas, b. 1832
- 1 Cockfighting
- 2 Cocktail lounges
- 3 Cocoa industry
- 1 Coconuts
- 1 Cocoons
- 1 Codes (regulations)
- 1 Cod-liver oil
- 1 Codman & Shurtleff
- 4 Coe, Thomas, 1819?-1886
- 12 Coffee
- 1 Coffee & Tea Press Building
- 2 Coffee cups
- 6 Coffee industry
- 1 Coffee roasters
- 5 Coffee shops
- 12 Coffeehouses
- 4 Coffeepots
- 7 Coffered ceilings
- 11 Coffins
- 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)
