All - Architectural style - Colonial Revival architecture
| Collyns House |
| Colonial Apartments |
| Colonial Apartments |
| Colonial Apartments |
| Colonial Beacon Gas Station |
| Colonial Block |
| Colonial Court |
| Colonial Hotel |
| Colonial House |
| Colonials Club House |
| Colonial Theater |
| Colonial Village |
| Colorado County Courthouse Historic District |
| Colorado Governor's Mansion |
| Colvin, Addison B., House |
| Combs, B. F., House |
| Comeaux House |
| Commandant's House |
| Commanding General's Quarters, Quantico Marine Base |
| Commodore Perry Hotel |
| Community Baptist Church and Parsonage |
| Community House |
| Community House |
| Community Memorial Hospital |
| Conant, Samuel B., House |
| Concord Haven |
| Conklin House |
| Conn, John P., House |
| Conover, Thomas J., House |
| Cony High School |
| Cook, Calvin and Maggie, House |
| Cooke, Wm. L., House |
| Cook House |
| Coolidge, Calvin, House |
| Coombs, Viola, House |
| Cooper, Davis C., House |
| Cooper House |
| Cooper, Thunise & Richard, House |
| Copperton Community Methodist Church |
| Coppola House |
| Coquille River Light |
| Corbett, Elliott R., House |
| Corbett, H. L. and Gretchen Hoyt, House |
| Corcoran Hall |
| Cornell Apartments |
| Cornell-Van Nostrand House |
| Cottage Court |
| Cottingham House |
| Cotton Free Library |
| Counts Hotel |
| Courteney, James, House |
| Courtlandt Place Historic District |
| Court Street School |
| Cowles, W.T., House |
| Cox, Angie Williams, Library |
| Cox-Carlton Hotel |
| Cox-Craddock House |
| Cox, Dr. Virgil, House |
| Coxe, Mary Mills, House |
| Cox, Mary Etta, House |
| Crabtree, Thomas, Three-Decker |
| Crafts Street City Stable |
| Craigie Arms |
| Craigsville School |
| Crandall, Louis A., House |
| Crane, Frank W., House |
| Crawford County Courthouse |
| Creamery Package Manufacturing Company Building |
| Crenshaw-Burleigh House |
| Crescent Farm |
| Cresthaven |
| Crimmins, Thomas A., House |
| Crome, William F. and Julia, House |
| Crook Farm |
| Croxson House |
| Crump, E. H., House |
| Cuckoo |
| Cullen, Victor, Center, Old Administration Building |
| Cumberland |
| cummings, e.e., House |
| Cummins, David J., House |
| Curtiss, Reuben, House |
| Cushman House |
| Cutler, Thomas R., Mansion |
| Cypress Court |
| Dahlgreen Courts |
| Dakota |
| Dallas Hall |
| Daly, John, House |
| Daly, Marcus, Memorial Hospital |
| Damariscotta Baptist Church |
| Damon Hall |
| Damour, William and Sue, House |
| Dana, Richard Henry, Branch |
| Dardanelle Agriculture and Post Office |
| Darling Inn |
| Darling, J.R., Store |
| Darling, Robert and Julia, House |
| Darnell, Rowland J., House |
| Darragh House |
Data from United States Park Service and Wikidata
