| Prometheus | Portland | OR |
| Providence Hospital | Portland | OR |
| Providence Medford Medical Center | Medford | OR |
| Provo | Portland | OR |
| P&T Builder | Portland | OR |
| P&T Voyager | Portland | OR |
| Public Service Building | Portland | OR |
| Public Works Building | Portland | OR |
| Publishers Paper | Portland | OR |
| Publishers Paper | Newberg | OR |
| Pulpit Rock | Portland | OR |
| Pumilite Building Supply - Plant | Albany | OR |
| Pump Pipe & Power | Portland | OR |
| Purfina | Portland | OR |
| Pvt. John R. Towle | Portland | OR |
| Quebec | Portland | OR |
| Queenston Heights | Portland | OR |
| Quinault Victory | Portland | OR |
| Rachel V. | Portland | OR |
| Radar Punatics | Portland | OR |
| Raderfab Construction | Portland | OR |
| Rainier | Portland | OR |
| Raleigh Hills Safeway Store | Portland | OR |
| Raleigh Scholls Apartments | Portland | OR |
| Ranger Tracker | Portland | OR |
| R.C. Brennan | Portland | OR |
| Reed Victory | Portland | OR |
| Reliance Equality | Portland | OR |
| Republic Steel | Portland | OR |
| Reynolds Aluminum | Troutdale | OR |
| Rhodesia Maru | Portland | OR |
| Rhodia | Portland | OR |
| Rice Queen | Portland | OR |
| Richard Harding Davis | Portland | OR |
| Richard H. Davis | Portland | OR |
| Richard J Oglesby | Portland | OR |
| Richard Mansfield | Portland | OR |
| Richard Rush | Portland | OR |
| River Raisin Paper | Portland | OR |
| Riverview Dairy | Portland | OR |
| R.L. Elfstrom | Corvallis | OR |
| Robert Fulton | Portland | OR |
| Robert J Walker | Portland | OR |
| Robert S. Bean | Portland | OR |
| Roberts Residence | Portland | OR |
| Rockland Victory | Portland | OR |
| Rock Springs Victory | Portland | OR |
| Rocky Butte Jail | Portland | OR |
| Rogue Valley Memorial Hospital | Medford | OR |
| Rosboro Lumber | Springfield | OR |
