Post Offices List in Clatsop County, Oregon:
| Astoria Post Office | 750 Commercial St, Astoria, OR 97103 |
| Cannon Beach Post Office | 163 N Hemlock, Cannon Beach, OR 97110 |
| Hammond Post Office | 906 Pacific Dr, Hammond, OR 97121 |
| Seaside Post Office | 300 Avenue A, Seaside, OR 97138 |
| Warrenton Post Office | 99 N Main Ave, Warrenton, OR 97146 |
| Gearhart Post Office | 546 Pacific Way, Seaside, OR 97138 |
| Tolovana Park Post Office | 3140 S Hemlock St, Tolovana Park, OR 97145 |