| Portable Pads Insulation Service | Seattle | WA |
| Port Angeles Division | Port Angeles | WA |
| Port Of Seattle | Seattle | WA |
| Port Townsend Paper | Port Townsend | WA |
| Potlatch | Spokane | WA |
| Prodica | Kennewick | WA |
| Professional Building | Tacoma | WA |
| Pronto Foods | Moses Lake | WA |
| Providence Everett Medical Center | Everett | WA |
| Providence Hospital | Seattle | WA |
| PSF Industries | Seattle | WA |
| Public Employees Mutual Insurance Company (Pemco) | Seattle | WA |
| Public Works | Tacoma | WA |
| Puget Sound | Tacoma | WA |
| Puget Sound Energy | Renton | WA |
| Puget Sound Engineering | Wenatchee | WA |
| Puget Sound International Railway & Power | Seattle | WA |
| Puget Sound Naval Shipyard | Bremerton | WA |
| Puget Sound Power & Light | Seattle | WA |
| Puget Sound Pulp & Timber | Seattle | WA |
| Puget Sound Pulp & Timber | Bellingham | WA |
| Puget Sound Refining | Anacortes | WA |
| Puget Sound Traction Light & Power | Seattle | WA |
| Puget Sound Traction Light & Power | Georgetown | WA |
| Puget Sound Tug & Barge | Seattle | WA |
| Pulp & Paperboard Division | Longview | WA |
| Puyallup High School | Tacoma | WA |
| Queen Anne High School | Seattle | WA |
| Radio Station KIRO | Seattle | WA |
| Rainier Avenue Pumping Station | Seattle | WA |
| Rainier Club | Seattle | WA |
| Rainier Heat & Power | Seattle | WA |
| Rainier Pulp & Paper | Shelton | WA |
| Ralph | Seattle | WA |
| Ranier Mechanical Constractors | Tacoma | WA |
| Rath Packing | Seattle | WA |
| Ravenna Elementary School | Seattle | WA |
| Rayonier | Seattle | WA |
| Rayonier | Hoquiam | WA |
| Rayonier | Shelton | WA |
| Rayonier | Port Angeles | WA |
| Redmond Swimming Pool | Kirkland | WA |
| Rendova | Tacoma | WA |
| Renton Defense Plant | Renton | WA |
| Renton Washington | Seattle | WA |
| Reynolds Aluminum | Longview | WA |
| R. Fiford Res | Bellingham | WA |
| Rhone Poulenc | Seattle | WA |
| Ridpath Hotel | Spokane | WA |
| Rivkins Jewelers | Seattle | WA |
