14 zips
| Zip Code | City | Population ↓ |
|---|---|---|
| 98837 | Moses Lake | 47,399 |
| 98848 | Quincy | 13,014 |
| 98823 | Ephrata | 12,661 |
| 99349 | Mattawa | 8,098 |
| 98851 | Soap Lake | 4,996 |
| 98857 | Warden | 3,935 |
| 99357 | Royal City | 3,550 |
| 99123 | Electric City | 952 |
| 99321 | Beverly | 905 |
| 99135 | Hartline | 441 |
| 98860 | Wilson Creek | 245 |
| 98824 | George | 239 |
| 98832 | Marlin | 158 |
| 98853 | Stratford | 0 |
The data shown reflect ZCTAs from the US Census. As of 2024, there are 14 ZCTAs in Grant County, Washington (US Census).