| Columbia Aviation Center | Aircraft maintenance and flight training |
| Compass Commercial Realty | Realtor for Aero Business Center |
| Composites Universal | Mfg of composite aircraft components |
| Eckelman Machining and Aircraft Specialties, LLC | Aircraft industry machine shop |
| Evergreen Aviation Services and Restoration | Aircraft restoration and parts |
| MetalCraft Machine Inc. | Aerospace and General CNC machining |
| Oregon Aero Inc. | Mfg of aircraft seats, helmets, & acc. |
| Overall Aircraft Services | Aeroplane & Helicopters Parts and Maint. |
| Port of St. Helens | Owner of Scappoose Industrial Airpark |
| Scappoose Jet Center | Hangar space & jet aircraft sales |
| Sherpa Aircraft | Mfg of Sherpa airplanes |
| Sierra Pacific Communities, LLC | Developer of Aero Business Center |
| Sport Copter | Gyroplane mfg and flight instruction |
| TransWestern Aviation, Inc. | Fuel, parts, supplies, courtesy cars |
