22 zips
| Zip Code | City | Population ↓ |
|---|---|---|
| 5641 | Barre | 16,969 |
| 5602 | Montpelier | 12,491 |
| 5663 | Northfield | 6,766 |
| 5676 | Waterbury | 4,894 |
| 5673 | Waitsfield | 2,465 |
| 5677 | Waterbury Center | 2,298 |
| 5667 | Plainfield | 2,245 |
| 5660 | Moretown | 1,900 |
| 5674 | Warren | 1,678 |
| 5658 | Marshfield | 1,652 |
| 5651 | East Montpelier | 1,499 |
| 5682 | Worcester | 1,257 |
| 5647 | Cabot | 1,150 |
| 5650 | East Calais | 842 |
| 5669 | Roxbury | 835 |
| 5648 | Calais | 533 |
| 5640 | Adamant | 288 |
| 5678 | Websterville | 181 |
| 5681 | Woodbury | 125 |
| 5670 | South Barre | 38 |
| 5666 | North Montpelier | 27 |
| 5664 | 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).