- 2 C.F. Rumpp (Firm)
- 1 C.G. Henderson & Co.
- 1 C.G. Hornbostel & Co.
- 1 C.H. Fargo & Co.
- 1 C.M. Moseman & Bro.
- 1 Cabinet knobs
- 2 Cabinet officers
- 1 Cabinet photographs
- 10 Cabinets (Case furniture)
- 7 Cabins
- 1 Cabot & Chandler, Architects
- 1 Cacao
- 10 Cactus
- 1 Cadets
- 1 Caduceus (Symbol)
- 2 Cadwalader, George, 1806-1879
- 1 Cadwallader Hall
- 1 Cadwallader Street
- 2 Cafe Leland
- 10 Cafes
- 4 Cafeterias
- 1 Caffrey Building
- 8 Cage, John, 1912-1992
- 6 Cages
- 1 Cahill, T.E. & Co.
- 3 Caiaphas, High priest, 1st cent.
- 2 Caillaux, Joseph, 1863-1944
- 1 Cain (Biblical figure)
- 35 Cairo, Egypt
- 3 Cakes
- 1 Calais, France
- 1 Calculator industry
- 1 Calculators
- 5 Caldecott, Randolph, 1846-1886
- 7 Calder, Alexander Milne, 1846-1923
- 8 Calder, Alexander Stirling
- 1 Caldera, Chile
- 1 Calderon, Frances (Fanny), 1804-1882
- 1 Caldwell, James Ernest
- 1 Caleb F. Clarke & Co.
