Washington - Significance region: Local
| 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 |
| Agate Pass Bridge |
| Agen Warehouse |
| Aircraft Warning Service Observation Tower |
| Alderbrook Farmhouse |
| Alderton School |
| Allen, Horatio and Laura, Farm |
| Allen House Hotel |
| Allen, John B., School |
| Almira Hotel |
| Amboy United Brethren Church |
| American Legion Cenotaph – Riverside Park Cemetery |
| American Legion Hall |
| American Veterans Building-Hoquiam |
| Amman |
| Anacortes Public Library |
| Anderson-Beletski Prune Farm |
| Anderson Island School |
| Anderson, Louise Chandler, House |
| Annobee Apartments |
| Ansorge Hotel |
| Appleton Log Hall |
| Arletta School |
| Arndt Prune Dryer |
| Arreguin, Alfredo & Susan Lytle, House and Studio |
| Ashford House |
| Assay Office |
| Auburn Post Office |
| Auburn Public Library |
| Auditorium Dance Hall, The |
| Austin Pass Warming Hut |
| Bachtold Building-Interurban Depot |
| Backus-Marblemount Ranger Station House No. 1009 |
| Backus-Marblemount Ranger Station House No. 1010 |
| Baker River Bridge |
| Ballard Carnegie Library |
| Ballard-Howe House |
| Ballast Island |
| Bank of Starbuck |
| Baring Bridge |
| Barksdale, Julian and Marajane, House |
| Barlow Building |
| Barnes Building |
| Barnett, Alonzo and Louise, House |
| Barron, J. C., Flour Mill |
| Bartlett, Frank, House |
| Bash, Henry, House |
| Bassett Hardware Co. Store |
| Bates-Tanner Farm |
| Bauer, Harvey and Mary, House |
| Baumeister, Max, Building |
| Beacon Hill School |
| Beaver Pass Shelter |
| Beaver School |
| Bell Apartments |
| Bell, Dr. Robert and Jessie, House |
| Bell Hotel |
| Bellingham City Hall |
| Bellingham Herald Building |
| Bellingham National Bank Building |
| Benewah Milk Bottle |
| Berthusen Barn and Privy |
| Berwind-Purcell House |
| Bethsaida Swedish Evangelical Lutheran Church Parsonage |
| Beutel, Conrad F. & Annie K., House |
| Big Creek Archeological Site-45MS100 |
| Big Four Furniture Building |
| Binkley, J. W., House |
| Birge, George E., House |
| Bishop, A. H., House |
| Bishop, Senator William, House and Office |
| Bisson, William, House |
| Black, Alfred L., House |
| Black Diamond Cemetery |
| Bleeker, Harry and Catherine, House |
| Blewett Arrastra |
| Blomeen, Oscar, House |
| Blue Mountain School |
| Blue Mouse Theatre |
| Boistfort High School |
| Bon Marche Department Store |
| Borst, Joseph, House |
| Bothell Pioneer Cemetery |
| Botten Cabin |
| Bowes Building |
| Bowles, Jesse C., House |
| B. P. O. E. Building |
| Brackett, E. William, 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 |
Data from United States Park Service and Wikidata
