| Zip Code | City | Population ↓ |
|---|---|---|
| 72764 | Springdale | 58,066 |
| 72701 | Fayetteville | 47,780 |
| 72762 | Springdale | 44,822 |
| 72703 | Fayetteville | 35,324 |
| 72704 | Fayetteville | 28,832 |
| 72730 | Farmington | 10,842 |
| 72753 | Prairie Grove | 10,363 |
| 72774 | West Fork | 7,138 |
| 72744 | Lincoln | 4,936 |
| 72959 | Winslow | 2,962 |
| 72717 | Canehill | 1,183 |
| 72769 | Summers | 1,172 |
| 72749 | Morrow | 401 |
| 72729 | Evansville | 99 |
The data shown reflect ZCTAs from the US Census. As of 2024, there are 14 ZCTAs in Washington County, Arkansas (US Census).