All - Constructed - 1880–1889
| Chatham Railroad Depot |
| Chattanooga Car Barns |
| Chemawa Indian School Site |
| Cheney, Alpha M., House |
| Chenoweth, Frank L., House |
| Chesterfield Historic District |
| Chestnut Street Baptist Church/Quinn Chapel A.M.E. Church |
| Chicago and Northwestern Railroad Passenger Depot |
| Chicago, Milwaukee and Saint Paul Railroad Depot |
| Chicago, Rock Island and Pacific Railroad Stone Arch Viaduct |
| Chilocco Indian Agricultural School |
| Christ Building |
| Christ Church |
| Christ Church Episcopal |
| Church of St. John the Baptist |
| Church of Sts. Joseph and Mary-Catholic |
| Church of St. Thomas the Apostle |
| Church of the Advent |
| Church of the Brethren |
| Church of the Epiphany |
| Church of the Transfiguration |
| Cigar Factory |
| Cimarron Hotel |
| City Hotel |
| City Park |
| City Pier A |
| Claremont Hotel |
| Clark-Blackwell House |
| Clark, George Boardman, House |
| Clark House |
| Clark-Robidoux House |
| Clark University |
| Clark, W. A., Mansion |
| Clay County Courthouse |
| Clayton, W. H. H., House |
| Clement, C. C., House |
| Clements Rowhouse |
| Clements Stone Arch Bridge |
| Cleveland Park Historic District |
| Cleveland West Pierhead Light |
| Cliffs Shaft Mine |
| Clinton County Courthouse |
| Cloud, Aaron G., House |
| Cloud Cap Inn |
| Clover Cliff Ranch House |
| Clyde, James William, House |
| Coal Creek Bridge |
| Cobb, Hezekiah W. and Sarah E. Fishell, House |
| Cochise Hotel |
| Coe, Amos B., House |
| Coe, Truman and Sylvia Bull, House |
| Cogan, Bernard, House |
| Cole, David, House |
| Colegio de las Madres del Sagrado Corazon |
| Cole House |
| College Block Building |
| Coller, Julius A., House |
| Colorado Street Bridge |
| Columbia County Courthouse |
| Columbus Transfer Company Warehouse |
| Commandant's Residence Home |
| Commercial Hotel |
| Como School |
| Comstock Covered Bridge |
| Conanicut Island Lighthouse |
| Concord Armory |
| Confederate Monument in Georgetown |
| Confederate Monument of Mt. Sterling |
| Conimicut Lighthouse |
| Converse Memorial Building |
| Cook, Anthony Wayne, Mansion |
| Cook, Maj. George Beecher, House |
| Cooney, Captain Michael, House |
| Cooper, George, House |
| Copas, John, House |
| Coppess, Benjamin Franklin House |
| Coralville Union Ecclesiastical Church |
| Corbin Building |
| Corbin, E.W., House |
| Corinth Town Hall and Corinthian Lodge #59, I.O.O.F. |
| Cornish House |
| Cornucopia Jailhouse |
| Cornwall Bridge Railroad Station |
| Cotton, C. N., Warehouse |
| Coues, Elliott, House |
| Courtney, J. B., Woolen Mills |
| Cowan, R. H., Livery Stable |
| Cow Camp |
| Cowley County National Bank Building |
| Cox Building, The |
| Crank House |
| Crawford Building |
| Crawforth, Charles, Farmstead |
| Cress, Herbert A. and Bettie E., House |
| Crestone School |
| Crocker, E. B., Art Gallery |
| Croton Aqueduct Gate House |
| Crouse College, Syracuse University |
| Crowan Cottage |
| Crowley Historic District |
Data from United States Park Service and Wikidata
