Washington - Area of significance: Health/Medicine
| American Lake Veterans Hospital |
| Blomeen, Oscar, House |
| Chase, Dr. Reuben, House |
| Clark County Poor Farm-Southwestern Washington Experiment Station |
| Columbia River Quarantine Station |
| Finch, John A., Memorial Nurses Home |
| Lord-Heuston House |
| Medical Dental Building |
| Northern State Hospital |
| Pend Oreille Mines and Metals Building |
| Phillips, Dr. John and Viola, House and Office |
| Pietrzycki, Dr. Marcel, House |
| Rhodes Medical Arts Building |
| Roosevelt Hall |
| Semar Block |
| Slagle, Jesse W. & Elizabeth, House |
| Smith Hospital and Douglas County Press Building |
| US Quarantine Station Surgeon's Residence |
| West, Dr. Edmond, House |
| Willard Building |
| YMCA Building-Walla Walla |
Data from United States Park Service and Wikidata
