| Hepta | Portland | OR |
| Herbert Malarkey Paper | Portland | OR |
| Herbert Malarky | Portland | OR |
| Hercules | Portland | OR |
| Hermon F. Whiton | Portland | OR |
| Hess Oil | Portland | OR |
| Hess Trader | Portland | OR |
| Hibbing Victory | Portland | OR |
| Hilda Marjanne | Portland | OR |
| Hines Edward Lumber | Westfir | OR |
| Holding | The Dalles | OR |
| Holiday Inn | Portland | OR |
| Homestead | Portland | OR |
| Hood River | Portland | OR |
| Horace White | Portland | OR |
| Hovenweep | Portland | OR |
| Hudson House | Milwaukie | OR |
| Hudspeth Pine | Portland | OR |
| Hudspeth & Rine | Prineville | OR |
| Hunters Point | Portland | OR |
| Huntington | Portland | OR |
| Hydro-Blast | Portland | OR |
| IBM | Portland | OR |
| Idaho Falls | Portland | OR |
| Idaho Standard | Portland | OR |
| Imperial Hotel | Portland | OR |
| Indian Explorer | Portland | OR |
| Indian Merchant | Portland | OR |
| Indian Pioneer | Portland | OR |
| Indian Trader | Portland | OR |
| Industrial Air Products | Portland | OR |
| Industrial Incinerator | Beaverton | OR |
| Inland Power & Light | Portland | OR |
| Insulate Buttner Dryer & Equipment | Portland | OR |
| Inter Mountain Gas | Portland | OR |
| International Paper | Portland | OR |
| International Paper | Vaughn | OR |
| International Paper | Gardiner | OR |
| Iran Victory | Portland | OR |
| Irene | Portland | OR |
| Irving W Pratt | Portland | OR |
| Isaac McCoy | Portland | OR |
| Jacksonville | Portland | OR |
| James B Eads | Portland | OR |
| James H Lane | Portland | OR |
| James K. Kelly | Portland | OR |
| James River | Clatskanie | OR |
| James River | Halsey | OR |
| James River | West Linn | OR |
| James River | Wauna | OR |
