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Willamette River
| States | Oregon |
| Length | 187.5 miles |
| Watershed Length* | 2,537 miles |
| Mouth | Columbia River ⤏ Eastern Pacific Ocean |
| GNIS | 1158060 |
Tributaries
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| Name | Distance from Mouth (miles) | Length (miles) | Watershed Length (miles) |
|---|---|---|---|
| Calapooia River | 121 | 82 | 82 |
| Chehalem Creek | 51 | 15 | 15 |
| Clackamas River | 25 | 84 | 167 |
| Johnson Creek | 18 | 26 | 26 |
| Long Tom River | 150 | 57 | 112 |
| Luckiamute River | 109 | 62 | 89 |
| Marys River | 134 | 43 | 78 |
| McKenzie River | 176 | 88 | 181 |
| Mill Creek | 84 | 27 | 40 |
| Molalla River | 36 | 52 | 249 |
| Rickreall Creek | 89 | 34 | 34 |
| Santiam River | 109 | 12 | 404 |
| Tualatin River | 28 | 85 | 224 |
| Willamette River - Coast Fork | 188 | 40 | 146 |
| Willamette River - East Channel | 134 | 4 | 74 |
| Willamette River - Middle Fork | 188 | 85 | 239 |
| Yamhill River | 55 | 11 | 191 |
* Note: Watershed is mostly rivers/streams 15+ miles in length.
Data from United States Geological Survey