Washington - Role: Building
| Boyer, John F., House |
| B. P. O. E. Building |
| Brackett, E. William, House |
| Brandes House |
| Bremerton Elks Temple Lodge No. 1181 Building |
| Breslin |
| Bridge Creek Cabin-Ranger Station |
| Bridge Creek Shelter |
| Brining, John, House |
| Brooker-Taylor House |
| Brooks, Kenneth and Edna, House |
| Bruce, William Perry, House |
| Buckeye Ranch House |
| Buckner Cabin |
| Building at 1602 South G Street |
| Building at 712-716 Sixth Avenue |
| Building No. 105, Boeing Airplane Company |
| Bump Block-Bellevue House-Hawthorne Hotel |
| Bumping Lake Cabin No. 16 |
| Bumping Lake Resort |
| Burke-Hill Apartments |
| Burlington Carnegie Library |
| Burlington Northern Depot |
| Burroughs, Dr. Frank R., House |
| Bush House |
| Butler-Jackson House |
| Butler, Norman Francis, House |
| Butterworth Building |
| Cabin No. 97 |
| Calhoun Hotel |
| California Fruit Store |
| California Ranch |
| Cambern Dutch Shop Windmill |
| Cambridge Apartments |
| Camlin Hotel |
| Campbell House |
| Camp Major Hopkins |
| Canfield, George and Nellie. House |
| Canton, William J., House |
| Canyon Creek Shelter |
| Capital Savings and Loan Association |
| Capitol Theatre |
| Carbonneau Mansion |
| Card, Rupert, House |
| Carey, J. W., House |
| Carmichael, Elizabeth Loudon, House |
| Carmichael-Loudon House |
| Carnegie, Andrew, Library |
| Carnegie Library |
| Catlin, Adam, House |
| Cedar Creek Grist Mill |
| Center School |
| Central Elementary School |
| Centralia Union Depot |
| Central Schoolhouse (District No. 49) |
| Central Service Station |
| Central Steam Heat Plant |
| Century 21-Washington State Coliseum |
| Chase, Dr. Reuben, House |
| Chatter Creek Guard Station |
| Chehalis Downtown Historic District |
| Chelan Butte Lookout |
| Chelsea Family Hotel |
| Cheney Interurban Depot |
| Cheney Odd Fellows Hall |
| Chiarelli, James and Pat, House |
| Chicago, Milwaukee, St. Paul & Pacific Railroad-Kittitas Depot |
| Chief Sealth High School |
| Chimacum Post Office |
| Chinese Baptist Church |
| Christ Episcopal Church |
| Christian Congregation Church of Port Ludlow |
| Christiansen, George and Blanche, House |
| Chumasero-Smith House |
| Church of the Blessed Sacrament, Priory, and School |
| City Hall |
| City Ramp Garage |
| Clallam County Courthouse |
| Claquato Church |
| Clark County Courthouse |
| Clark Mansion |
| Clarkston Public Library |
| Clayton School |
| Cle Elum-Roslyn Beneficial Association Hospital |
| Clemmer Theater |
| Clise, James W., House |
| Cloverfields |
| Cloverland Garage |
| Cobb Building |
| Coder-Coleman House |
| Coffee Pot Restaurant, The |
| Colbert House |
| Coleman-Furlong House |
| Coliseum Theater |
| Collins Building |
| Collins House and Granary |
| Colman Automotive Building |
| Colman Building |
| Colonial Hotel |
| Colonnade Hotel |
Data from United States Park Service and Wikidata
