| name | image | Average flow (m³/s) | basin (m²) | Height (m) | origin location | mouth location | Length (m) | latitude (°) | longitude (°) | canyon | Map |
|---|---|---|---|---|---|---|---|---|---|---|---|
| Dairy Creek (Oregon) |  | 585,337,280 | Tualatin River | 16,980 | 45.5017000000 | -122.9950000000 | Map | ||||
| Fanno Creek |  | 82,102,624 | 146 | Tualatin River | 24,000 | 45.3931000000 | -122.7640000000 | Map | |||
| Gales Creek (Oregon) |  | 201,760,064 | Tualatin River | 38,000 | 45.4914000000 | -123.1020000000 | Map | ||||
| Scoggins Creek |  | 116,808,456 | Tualatin River | 31,000 | 45.5073000000 | -123.2490000000 | Map |