9 zips
| Zip Code | City | Population ↓ |
|---|---|---|
| 98250 | Friday Harbor | 9,254 |
| 98245 | Eastsound | 4,265 |
| 98261 | Lopez Island | 2,984 |
| 98279 | Olga | 680 |
| 98280 | Orcas | 442 |
| 98243 | Deer Harbor | 327 |
| 98286 | Shaw Island | 155 |
| 98222 | Blakely Island | 121 |
| 98297 | Waldron | 47 |
The data shown reflect ZCTAs from the US Census. As of 2024, there are 9 ZCTAs in San Juan County, Washington (US Census).