Washington - Area of significance: Architecture
| 1411 Fourth Avenue Building |
| 1600 East John Street Apartments |
| 1926 Model Brick Home |
| Adair, William and Estella, Farm |
| Adams County Courthouse |
| Admiral's House, 13th Naval District |
| ADVENTURESS |
| Aftermath Clubhouse |
| Agen Warehouse |
| Albers Brothers Mill |
| Alderbrook Farmhouse |
| Allen, Horatio and Laura, Farm |
| Allen House Hotel |
| Allen, John B., School |
| Almira Hotel |
| Altair Campground Community Kitchen |
| Amboy United Brethren Church |
| American Lake Veterans Hospital |
| American Veterans Building-Hoquiam |
| Amman |
| Anacortes Public Library |
| Anderson, Louise Chandler, House |
| Annobee Apartments |
| Appleton Log Hall |
| Arctic Building |
| Arletta School |
| ARTHUR FOSS (tugboat) |
| Ashford House |
| Assay Office |
| Auburn Post Office |
| Auburn Public Library |
| Austin Pass Warming Hut |
| Bachtold Building-Interurban Depot |
| Backus-Marblemount Ranger Station House No. 1009 |
| Backus-Marblemount Ranger Station House No. 1010 |
| Bacon, George H., House |
| Badger Mountain Lookout |
| Balfour Dock Building |
| Ballard Avenue Historic District |
| Ballard Carnegie Library |
| Ballard-Howe House |
| Ballinger, Richard A., House |
| Barksdale, Julian and Marajane, House |
| Barlow Building |
| Barnes Building |
| Barnett, Alonzo and Louise, House |
| Bartlett, Frank, House |
| Bash, Henry, House |
| Bassett Hardware Co. Store |
| Bates-Tanner Farm |
| Bauer, Harvey and Mary, House |
| Baumeister, Max, Building |
| Bay View Brewery |
| Beacon Hill School |
| Beaver Pass Shelter |
| Bell Apartments |
| Bell, Dr. Robert and Jessie, House |
| Bellingham City Hall |
| Bellingham Herald Building |
| Bellingham National Bank Building |
| Benewah Milk Bottle |
| Benton County Courthouse |
| Berthusen Barn and Privy |
| Berwind-Purcell House |
| Big Four Furniture Building |
| Birge, George E., House |
| Bishop, A. H., House |
| Bisson, William, House |
| Black, Alfred L., House |
| Bleeker, Harry and Catherine, House |
| Blomeen, Oscar, House |
| Blue Mouse Theatre |
| Boatman-Ainsworth Hose |
| Bonaparte Mountain Cabin |
| Bon Marche Department Store |
| Borst, Joseph, House |
| Botten Cabin |
| Boundary Hydroelectric Project |
| Bowes Building |
| Bowles, Jesse C., 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 |
| Broadway Park Historic District |
| Brooker-Taylor House |
| Brooks, Kenneth and Edna, House |
| Browne's Addition Historic District |
| Brown’s First Addition Historic District |
| Browns Point Lighthouse and Keeper's Cottage |
| Bruce, William Perry, House |
| Buckeye Ranch House |
| Buckley's Addition Historic District |
| Building at 1602 South G Street |
| Building at 712-716 Sixth Avenue |
| Bump Block-Bellevue House-Hawthorne Hotel |
Data from United States Park Service and Wikidata
