All - Constructed - 1920–1929
| Buckeye State Building and Loan Company Building |
| Buckley, Judge John L., House |
| Buffalo Bill Statue |
| Buffalo Presbyterian Church and Cemeteries |
| Buffalo Public School No. 77 (PS 77) |
| Buffington, Dr. T.E., House |
| Builders Exchange Building |
| Builders Exchange Building |
| Building at 1505-1509 Oak Avenue |
| Building at 1929-1931 Sherman Avenue |
| Building at 2440 N. Lakeview Avenue |
| Building at 399 West Fullerton Parkway |
| Building at 525 Cooper Street |
| Building at 548-606 Michigan Avenue |
| Building at 5510 North Sheridan |
| Building at 600 Main Street |
| Building at 813-815 Forest Avenue |
| Building at 999 Michigan, 200 Lee |
| Buildings at 1104-1110 Seward |
| Buildings at 815-817 Brummel and 819-821 Brummel |
| Buildings at 825-829 Blue Hill Avenue |
| Bullock's Wilshire Building |
| Bunche, Ralph, House |
| Bunnell Water Tower |
| Burdette Building |
| Burlington State Armory |
| Burnett, H. C., House |
| Butler Fieldhouse |
| Butler Street Colored Methodist Episcopal Church |
| Butler-Wallin House |
| Byrd, C. E., High School |
| Cactus Press-Plaza Paint Building |
| Cadiz Township Joint District No. 2 School |
| Calhoun, John C., State Office Building |
| Caliente Railroad Depot |
| California Theatre, The |
| Callas Sweet Shop |
| Calvary Baptist Church |
| Calvary Methodist Church |
| Cambria Casino |
| Cambridge Home for the Aged and Infirm |
| Camden Amphitheatre and Public Library |
| Camlin Hotel |
| Cammock's Hotel |
| Campbell, Collen C., House |
| Canadian National Railways Depot |
| Canon City Municipal Building |
| Canton High School |
| Canton Township Carnegie Library |
| Cape Spencer Lighthouse |
| Capital Club Building |
| Capitol Diner |
| Capitol Theater Building |
| Capitol Theatre |
| Cappelen Memorial Bridge |
| Cardozo, Francis L., Senior High School |
| Carling Hotel |
| Carlisle Gymnasium |
| Carlton Hotel |
| Carnation Milk Plant |
| Carolina Casket Company |
| Carolina Inn |
| Carousel at Glen Echo Park |
| Carrier Congregational Church |
| Carrier, Robert M., House |
| Carroll County Courthouse |
| Carson School |
| Carter House |
| Cary Lawn |
| Casa Consistorial De Mayaguez |
| Casa Grande Hospital |
| Casa Grande Stone Church |
| Casa Grande Woman's Club Building |
| Casa Roig |
| Casey's Diner |
| Cassidy, Daniel, House |
| Castillo de San Marcos National Monument |
| Castillo de Serralles |
| Castle, The |
| Cathedral of Learning |
| Cathedral of Saint Helena |
| Cathedral of the Immaculate Conception |
| Cathedral of the Nativity of the Blessed Virgin Mary |
| Catholic Church of the Sacred Heart |
| Cattle Queen Snowshoe Cabin |
| Cave-In-Rock |
| Cedar Avenue Bridge |
| Cedar Creek Bridge |
| Cedar Crest |
| Cedarville School |
| Center Road-Tittabawassee River Bridge |
| Central Building of the Columbus Young Men's Christian Association |
| Central Christian Church |
| Central Congregational Church |
| Central Fire Station |
| Central High School |
| Central National Bank |
| Central Park Bandstand |
| Central School |
| Central Tower Building |
Data from United States Park Service and Wikidata
