All - Architectural style - Italianate architecture
| Building at 259 Mount Auburn Street |
| Building at 361 Broadway |
| Building at 409 West Baltimore Street |
| Building at 510-516 Ohio Street |
| Building at 51 Hunt Street |
| Building at 6 and 7 Public Square |
| Building at 810 Wabash Avenue |
| Building at One Pendleton Place |
| Burbank-Livingston-Griggs House |
| Burdick, Anthony, House |
| Burlington and Missouri River Railroad Passenger Station |
| Burlington Headquarters Building |
| Burnett-Montgomery House |
| Burnett, William, House |
| Burr Oak Savings Bank |
| Bush, Asahel, House |
| Buswell, Clara, House |
| Butler House |
| Byram-Middleton House |
| Caldwell Block |
| Calhoun Farmhouse |
| Calkins, Charles H., House |
| Campbell-Rumsey House |
| Canemount |
| Cannon, Wilbur D. and Hattie, House |
| Cappon, Isaac, House |
| Carpenter and Bean Block |
| Carr, Jefferson Davis, House |
| Carr, Robert P., House |
| Carter Mansion |
| Carter, Nicholas, House |
| Cates, Charles F. and Howard, Farm |
| Cavitt House |
| Cawood, Richard L., Residence |
| Cedarburg Woolen Co. Worsted Mill |
| Center School |
| Central Fire Station |
| Central House |
| Central House Hotel |
| Chadwell, Robert, House |
| Chamberlain, Samuel, House |
| Chana School |
| Chandler, Gen. Samuel, House |
| Charlton, William H., House |
| Chase County National Bank |
| Chatham-Arch Historic District |
| Cheatham, John E., House |
| Chestnut Grove |
| Chicago, Milwaukee, St. Paul and Pacific Depot, Freight House and Train Shed |
| Chickasaw School and Rectory |
| Childress-Ray House |
| Church, Zalmon, House |
| Cincinnati East Manufacturing and Warehouse District |
| City and Town Hall |
| Clark, Alexander, House |
| Clark, Dr., House |
| Clarke, Edwin W. and Charlotte, House |
| Clark House |
| Clay County Courthouse |
| Clearwater Masonic Lodge-Grand Army of the Republic Hall |
| Clement, George S., House |
| Cloud, Aaron G., House |
| Clover Bottom Farm |
| Clover Cliff Ranch House |
| Coffee County Courthouse |
| Colburn, Gilbert, House |
| Cole-Evans House |
| Cole, William I, House |
| Colgate, Robert, House |
| College Block Building |
| College Block-Lisbon Block |
| Columbus Downtown Historic District |
| Colwell, David B., House |
| Coman House |
| Commercial Hotel |
| Commercial House |
| Conley, Sanford F., House |
| Cook-Rutledge House |
| Cooley-Whitney House |
| Cooper, George and Margaret, House |
| Copeland House |
| Corinth Town Hall and Corinthian Lodge #59, I.O.O.F. |
| Cornelius, Benjamin, Jr., House |
| Corning Opera House |
| Cornish House |
| Cowles, George H and Alice Spaulding, House |
| Cox-Budlong House |
| Cox, George B., House |
| Cox, Jacob D., House |
| Cozad, Justus L., House |
| Craigmiles, P. M., House |
| Crawford County Courthouse |
| Crittenden Farm |
| Crocker, Capt. Alexander, House |
| Crosby, James B., House |
| Cross, Harvey, House |
| Culbertson House |
| Culbertson, William, House |
| Cummins Block Building |
| Cummins School |
Data from United States Park Service and Wikidata
