Major Intersections
- Note: mileposts do not reflect actual mileage due to realignments.
| County | Location | Mile | Destinations | Notes |
|---|---|---|---|---|
| Lincoln | -0.22 | US 101 – Tillamook, Astoria, Lincoln City, Newport | Interchange | |
| Otis Junction | 1.31 | Old Scenic Highway 101 | ||
| Polk | 22.60 | Spirit Mountain Casino | Interchange | |
| Valley Junction | 23.04 | OR 22 west – Hebo, Tillamook | West end of OR 22 overlap | |
| 27.16 | OR 18 Bus. east – Willamina, Sheridan |
Interchange | ||
| 27.28 | OR 22 east – Salem | Interchange; east end of OR 22 overlap | ||
| Yamhill County | Sheridan | 32.60 | Sheridan | Interchange; signed as exit 33 |
| 33.82 | OR 18 Bus. west – Sheridan, Willamina |
Interchange; westbound exit and eastbound entrance; signed as exit 34 | ||
| Bellevue | 36.93 | Amity, Salem (OR 153) | ||
| McMinnville | 44.36 | OR 99W – Corvallis, McMinnville | Interchange | |
| 46.13 | McMinnville (McMinnville Spur) | Interchange | ||
| 49.91 | OR 233 south (Lafayette Highway) – Lafayette, Hopewell, Amity | West end of OR 233 overlap | ||
| Dayton | 51.37 | OR 221 – Dayton, Salem | Interchange | |
| 52.71 | OR 99W north – Portland |
Read more about this topic: Oregon Route 18
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