All - Constructed - 1930–1939
| Brockport Central Rural High School |
| Bronx County Courthouse |
| Brown, A. H., Public Library |
| Brown, George McKesson, Estate-Coindre Hall |
| Brown, Joseph H., School |
| Brownley Confectionary Building |
| Brown's Creek CCC Camp Barracks |
| Brush Creek Bridge |
| Bryant Building |
| Buck Camp Patrol Cabin |
| Buckingham Training School |
| Buck Mountain Lookout Tower |
| Buena Vista Ranger Station |
| Bueyeros School |
| Buffalo City Hall |
| Buffalo City Park Pavilion |
| Building 800-Austin Hall |
| Building at 116 John Street |
| Building at 19 Rector St. |
| Building at 21 West Street |
| Bullfoot Creek Bridge |
| Bunnell City Hall |
| Burke County World War Memorial Hall |
| Burnet County Courthouse |
| Burns Lake Bungalow |
| Bush Stadium |
| Butts Point Creek Fire Lookout |
| Cabin Creek Ranger Residence and Dormitory |
| Cable Creek Bridge |
| Caddo Community Building |
| Calfee Athletic Field |
| California Hotel |
| Cal-Vada Lodge Hotel |
| Campbell, Calvin A. and Alta Koch, House |
| Campbell, Gina Smith, Bathhouse |
| Camp Lee Canyon |
| Camp Logan National Guard Rifle Range Historic District |
| Camp Manatoc Dining Hall |
| Camp North Bend |
| Camp Williams Hostess House/Officers' Club |
| Cannomok'e-Pipestone National Monument |
| Canute Service Station |
| Canyon Creek Shelter |
| Canyon de Chelly National Monument |
| Canyon Overlook Trail |
| Cape Creek Bridge No. 01113 |
| Cape Perpetua Shelter and Parapet |
| Capital Bank Tower |
| Captain Creek Bridge |
| Caretaker's Cabin |
| Carew Tower |
| Carey Dome Fire Lookout |
| Carlson, Oscar, House |
| Carmichael House |
| Carnifex Ferry State Park |
| Carrisa Lookout Complex |
| Carrizozo Woman's Club |
| Carrollton Hall |
| Casa de Espana |
| Casa de Jaime Puig Lemoine |
| Cascade Canyon Barn |
| Cascade Theatre |
| Cash Grocery and Sales Company Warehouse |
| Casper Federal Building |
| Cassbille Ranger Station Historic District |
| Castle Crest |
| Castle Rock |
| Catoosa County Courthouse |
| Cavanagh, Joseph A., House |
| Cedars, The |
| Central National Tower |
| Central Receiving Building |
| Central School |
| Chalet of the Golden Fleece |
| Chalet Suzanne |
| Chambers Street Subway Station (Dual System IRT) |
| Chambliss Building |
| Charles City Junior-Senior High School |
| Charlotte Coca-Cola Bottling Company Plant, Former |
| Chaska Historical Marker |
| Chelan Butte Lookout |
| Chenocetah Fire Tower |
| Cherokee Armory |
| Cherry Hall |
| Chesapeake and Ohio Canal National Historical Park Historic District (Boundary Increase) |
| CHESAPEAKE (lightship) |
| Chevra Linas Hazedek Synagogue of Harlem and the Bronx |
| Chewning House |
| Chicago Board of Trade Building |
| Chief Black Hawk Statue |
| Chief Mountain Border Station and Quarters |
| Children's Country Home |
| Children's Village-Illinois Soldiers' and Sailors' Children's School |
| Chilton Post Office |
| Chimayo Trading Post and Trujillo, E.D., House |
| Chinook Pass Entrance Arch |
| Christian Park School No. 82 |
| Christian Record Building |
| Chrysler Building |
| Chuck Swan Fire Lookout Tower |
Data from United States Park Service and Wikidata
