| Caltex Bangkok | Portland | OR |
| Caltex Cape Town | Portland | OR |
| Caltex Copenhagen | Portland | OR |
| Caltex Durban | Portland | OR |
| Caltex Genoa | Portland | OR |
| Caltex Glasgow | Portland | OR |
| Caltex Istanbul | Portland | OR |
| Caltex Johannesburg | Portland | OR |
| Caltex Lisbon | Portland | OR |
| Caltex Lubu | Portland | OR |
| Caltex Manilla | Portland | OR |
| Caltex Melbourne | Portland | OR |
| Caltex Nantes | Portland | OR |
| Caltex Oslo | Portland | OR |
| Caltex Rhodesia | Portland | OR |
| Camp Adair | Corvallis | OR |
| Camp Namanee | Portland | OR |
| Camp Namanu | Portland | OR |
| Canada Victory | Portland | OR |
| Cannon Beach | Portland | OR |
| Capital Building | Salem | OR |
| Capital Victory | Portland | OR |
| Capitol Manor | Salem | OR |
| Capitol Reef | Portland | OR |
| Captain Nicholas Sitinas | Portland | OR |
| Captain Parker | Portland | OR |
| Carlsbad | Portland | OR |
| Carnation Milk Products | Hillsboro | OR |
| Carolina Pacific Plywood | Grants Pass | OR |
| Carolyn E. Conway | Portland | OR |
| Casa Grande | Portland | OR |
| Cascade Fiber | Eugene | OR |
| Cascade Plywood | Lebanon | OR |
| Cascade Warehouse | Salem | OR |
| Cass Gilbert | Portland | OR |
| Castle Pinckney | Portland | OR |
| Cathy | Portland | OR |
| Cebu Maru | Portland | OR |
| Cedar Breaks | Portland | OR |
| Celilo | Portland | OR |
| Central Heating | Portland | OR |
| Century Fund, Century Lanes | Portland | OR |
| Cesco Corrado | Portland | OR |
| Chaco Canyon | Portland | OR |
| Chalmette | Portland | OR |
| Chamber Of Commerce Building | Portland | OR |
| Champoeg | Portland | OR |
| Chapman Woods | Philomath | OR |
| Charles A Broadwater | Portland | OR |
| Chase Bag | Portland | OR |
