| Zip Code | City | Population ↓ |
|---|---|---|
| 98501 | Olympia | 48,067 |
| 98503 | Lacey | 41,656 |
| 98513 | Olympia | 38,017 |
| 98502 | Olympia | 35,398 |
| 98512 | Olympia | 31,864 |
| 98516 | Olympia | 29,177 |
| 98597 | Yelm | 26,669 |
| 98506 | Olympia | 18,497 |
| 98579 | Rochester | 14,048 |
| 98589 | Tenino | 7,010 |
| 98576 | Rainier | 4,985 |
| 98505 | Olympia | 881 |
| 98530 | Bucoda | 619 |
| 98556 | Littlerock | 350 |
The data shown reflect ZCTAs from the US Census. As of 2025, there are 14 ZCTAs in Thurston County, Washington (US Census).