| Locality | Post Code |
|---|---|
| Anacortes, San Juan | 98222 |
| Blakely Island, San Juan | 98222 |
| Deer Harbor, San Juan | 98243 |
| Doebay, San Juan | 98279 |
| Eastsound, San Juan | 98245 |
| Friday Harbor, San Juan | 98250 |
| Lopez Island, San Juan | 98261 |
| Olga, San Juan | 98279 |
| Orcas, San Juan | 98280 |
| Port Stanley, San Juan | 98261 |
| Roche Harbor, San Juan | 98250 |
| San Juan Island, San Juan | 98250 |
| Shaw Island, San Juan | 98286 |
| Waldron, San Juan | 98297 |