All - Constructed - 1930–1939
| Church of the St. Sava Serbian Orthodox Monastery |
| Chute Pond Dam |
| Cincinnati Union Terminal |
| City Hall |
| City of Alliance Central Park Fountain |
| Civilian Conservation Corp Camp F-10 |
| Civilian Conservation Corps Camp S-52 |
| Civilian Conservation Corps Powder Magazine |
| Clark Avenue Railroad Underpass |
| Clark County Courthouse |
| Clark Hall, University of Virginia |
| Clayton Public Library |
| Clear Creek Camel Truss Bridge |
| Cleburne County High School |
| Cleveland Club |
| Cleveland Municipal Stadium |
| Coal House |
| Coker, James L., III, House |
| Colby City Hall |
| Colonial National Historical Park |
| Colonial Theater |
| Colonial Village |
| Colorado Springs Fine Arts Center |
| Colorado Women's Prison |
| Colored Musicians Club |
| Columbian School |
| Columbus-Belmont Civil War State Park |
| Columbus Gallery of Fine Arts |
| Columbus Izaak Walton League Lodge |
| Columbus Loup River Bridge |
| Columbus Post Office |
| Community Building |
| Community Clubhouse |
| Compton and Bloomfield |
| Concordia Parish Courthouse |
| Coney Island Fire Station Pumping Station |
| Confederate Avenue Brick Arch Bridge |
| Conner, Donald L., House |
| Constitution Square Historic District |
| Continental Oil Company Filling Station |
| Converse, Ralph, House |
| Conway House |
| Cook, Merlyn G., School |
| Coolidge Dam |
| Cooper Apartments |
| Copeland & Tracht Service Station |
| Copper Mountain Fire Lookout |
| Corner, B.B., Memorial Library |
| Cotter Bridge |
| Council Ranger Station |
| Cousins Bros. Trading Post |
| Cove Creek Bridge |
| Cove Creek Tributary Bridge |
| Cove Lake Spillway Dam-Bridge |
| Cowell Memorial Hospital |
| Crabtree Creek-Hoffman Covered Bridge |
| Craig, Mrs. Edward B., House |
| Crane Flat Fire Lookout |
| Crater Lake Superintendent's Residence |
| Creamery Bridge |
| Cream Hill Shelter |
| Crescent Elementary School |
| Crescent School |
| Crestview Park |
| Crossnore School Historic District |
| Crystal Springs Fountain |
| Cunningham-Hall Pt-6,Nc-692W |
| Curtis Arboretum |
| Cushman No. 2 Hydroelectric Power Plant |
| Custer State Park Museum |
| Dau, William C. and Hertha, House |
| Davis Memorial |
| Dayton High School |
| Dead Indian Canyon Bridge |
| Death Canyon Barn |
| De Baca County Courthouse |
| Debar Pond Lodge |
| Deception Pass |
| Deep Well Ranch |
| Deertrees Theatre |
| Delaware Academy of Medicine |
| Delaware River Composite Truss Bridge |
| Dell Rhea's Chicken Basket |
| Delmarva Power and Light Building |
| De Mores Memorial Park |
| Denby, Edwin, High School |
| Denton Road-Sparks Foundation Park Pond Bridge |
| De Pere Public Library |
| Depot Historic District |
| Derleth, August W., House |
| Desert Experimental Range Station Historic District |
| Desolation Peak Lookout |
| Detroit Industry Murals, Detroit Institute of Arts |
| Dettman, Art, Fishing Shanty |
| De Valls Bluff Waterworks |
| Devil's Den State Park Historic District |
| DeWitt County Monument |
| Diablo Hydroelectric Power Plant |
| Dickson County War Memorial Building |
| Diehl, Oscar C., House |
Data from United States Park Service and Wikidata
