California - Criteria: C (architecture/engineering)
| Brown, Jackson Fay, House |
| Brown, John Stanford, House |
| Bruff's Rock Petroglyph Site |
| Bryan Court |
| Bryson Apartment Hotel |
| Buck Camp Patrol Cabin |
| Buck, Frank LaVerne, House |
| Buckridge Ranch House |
| Buck, Will H., House |
| Buehler, Maynard and Katharine, House |
| Buena Vista Vineyards-Buena Vista Vinicultural Society |
| Buford House |
| Buhach Grammar School |
| Building at 1735-1737 Webster Street |
| Building at 1813-1813B Sutter Street |
| Building at 1840-1842 Eddy Street |
| Building at 27-29 Fountain Alley |
| Building at 33-35 Beideman Place |
| Building at 45-57 Beideman Place |
| Building at 735 Market Street |
| Building at 816 South Grand Avenue |
| Bullock's Pasadena |
| Bullock's Wilshire Building |
| Bungalow Court at 1516 N. Serrano Ave |
| Bungalow Court at 1544 N. Serrano Avenue |
| Bungalow Court at 1554 N. Serrano Avenue |
| Bungalow Court at 1721 N. Kingsley Drive |
| Bungalow Heaven Historic District |
| Burlingame Railroad Station |
| Burnham-Marston House |
| Burr House |
| Burro Schmidt's Tunnel |
| Butterfield, John A., House |
| Cabin Creek Ranger Residence and Dormitory |
| Cabrillo National Monument |
| Cady House |
| Cahuenga Branch |
| Calaveras County Bank |
| Calaveritas Creek Bridge |
| Caledonia Adobe |
| Calico Mountains Archeological District |
| California Club, The |
| California Cotton Mills Company Factory |
| California Governor's Mansion |
| California Hall |
| California Hotel |
| California Memorial Stadium |
| California Nursery Co. Guest House |
| California Quadrangle |
| California State Capitol |
| Call-Booth House |
| Calvary Presbyterian Church |
| Camarillo Ranch House |
| Camera Obscura |
| Cameron-Stanford House |
| Campbell Union Grammar School |
| Campbell Union High School Historic District |
| Camp Curry Historic District |
| Campo de Cahuenga |
| Canfield-Wright House |
| Carey House |
| Carling, Foster, House |
| Carlsbad Santa Fe Depot |
| Carly, J.C., House |
| Carmelita Court |
| Carmel Mission |
| Carmichael, Norman and Florence B., House |
| Carnegie, Andrew, Library |
| Carnegie Free Library |
| Carnegie Public Library Building |
| Carneros Creek Bridge on Old Sonoma Road |
| Carolands, The |
| Carr House |
| Carriger, Nicholas, Estate |
| Carrizo Plain Rock Art Discontiguous District |
| Carroll Avenue, 1300 Block |
| Casa de Parley Johnson |
| Casa de Rosas |
| Casa Peralta |
| Cascade Theatre |
| Case Study House No. 1 |
| Case Study House No. 16 |
| Case Study House No. 20 |
| Case Study House No. 21 |
| Case Study House No. 22 |
| Case Study House No. 23C |
| Case Study House No. 28 |
| Case Study House No. 9 |
| Castle, The |
| Castro, Jose, House |
| Castro, Jose Joaquin, Adobe |
| Catholic-Protestant Chapels, Veterans Administration Center |
| Cecil Ranch |
| Centinela Adobe |
| Central Embarcadero Piers Historic District |
| Chalfant Petroglyph Site |
| Chamber of Commerce Building |
| Chambord Apartments |
| Chapel of the Transfiguration |
| Chaplain's House |
Data from United States Park Service and Wikidata
