All - Architectural style - Neoclassical architecture
| Carlton, Theatre, The |
| Carnegie, Andrew, Library |
| Carnegie Free Library |
| Carnegie Free Library |
| Carnegie Free Library |
| Carnegie Free Library, Beaver Falls |
| Carnegie Free Public Library |
| Carnegie Library |
| Carnegie Library |
| Carnegie Library |
| Carnegie Library |
| Carnegie Library |
| Carnegie Library |
| Carnegie Library |
| Carnegie Library |
| Carnegie Library |
| Carnegie Library |
| Carnegie Library |
| Carnegie Library |
| Carnegie Library |
| Carnegie Library Building |
| Carnegie Library of Albany |
| Carnegie Library of Covington |
| Carnegie Library of Valdosta |
| Carnegie Library (Old Wilberforce University Campus) |
| Carnegie Public Library |
| Carnegie Public Library |
| Carnegie Public Library |
| Carnegie Public Library |
| Carnegie Public Library |
| Carnegie Public Library |
| Carolina Inn |
| Carondelet School |
| Carr, Andrew, Sr., House |
| Carreau Block |
| Carr, Martin W., School |
| Carroll County Courthouse |
| Carroll County Infirmary |
| Carroll County Sheriff's Quarters and Jail |
| Carroll, J. J., House |
| Carter County Courthouse |
| Carter, W. F., House |
| Cartier, William A. and Catherine, House |
| Casa Agostini |
| Casa Consistorial De Mayaguez |
| Case Library |
| Casper Federal Building |
| Cass Bank and Trust Company |
| Cass County Courthouse |
| Castner-Knott Building |
| Caswell, Daniel H. and William T., Houses |
| Catahoula Parish Courthouse |
| Cathedral Mansions Apartment Buildings |
| Cathedral Nuestra Senora de Guadalupe of Ponce |
| Cavalier Hotel |
| Cavaness, Garvin, House |
| Cayce, William J., House |
| Cedars, The |
| Celaya-Creager House |
| Cementerio Antiguo de Ponce |
| Centenary Methodist Church |
| Center Building-Minnesota Hospital for The Insane |
| Center Methodist Church |
| Center Wheeling Market |
| Central Baptist Church |
| Central Garage |
| Central High School |
| Central High School |
| Central Intermediate School |
| Central Library |
| Central Park Bandstand |
| Central School |
| Central School |
| Central School Campus |
| Central Technical High School |
| Centro Asturiano |
| Chadron Public Library |
| Chamber of Commerce |
| Chamber of Commerce Building |
| Chamber of Commerce Building |
| Chance, James O., House |
| Chapin National Bank Building |
| Chapin School |
| Chapman Branch Library |
| Chapman-Steed House |
| Chariton City Hall and Fire Station |
| Chariton Free Public Library |
| Chariton Herald-Patriot Building |
| Charlcote House |
| Charleston City Hall |
| Charles Turner Open Air School |
| Chatham, Thurmond and Lucy, House |
| Chattooga County Courthouse |
| Chellowe |
| Cherokee County Courthouse |
| Cherokee County Courthouse |
| Cherry Hall |
| Cherryvale Carnegie Free Library |
| Chesapeake and Ohio Depot |
| Chesapeake and Ohio Passenger Depot |
Data from United States Park Service and Wikidata
