22 zips
| Zip Code | City | Population ↓ |
|---|---|---|
| 05641 | Barre | 16,969 |
| 05602 | Montpelier | 12,491 |
| 05663 | Northfield | 6,766 |
| 05676 | Waterbury | 4,894 |
| 05673 | Waitsfield | 2,465 |
| 05677 | Waterbury Center | 2,298 |
| 05667 | Plainfield | 2,245 |
| 05660 | Moretown | 1,900 |
| 05674 | Warren | 1,678 |
| 05658 | Marshfield | 1,652 |
| 05651 | East Montpelier | 1,499 |
| 05682 | Worcester | 1,257 |
| 05647 | Cabot | 1,150 |
| 05650 | East Calais | 842 |
| 05669 | Roxbury | 835 |
| 05648 | Calais | 533 |
| 05640 | Adamant | 288 |
| 05678 | Websterville | 181 |
| 05681 | Woodbury | 125 |
| 05670 | South Barre | 38 |
| 05666 | North Montpelier | 27 |
| 05664 | Northfield Falls | 0 |
The data shown reflect ZCTAs from the US Census. As of 2024, there are 22 ZCTAs in Washington County, Vermont (US Census).