22 zips
| Zip Code | City | Population ↓ |
|---|---|---|
| 5641 | Barre | 16,860 |
| 5602 | Montpelier | 12,572 |
| 5663 | Northfield | 6,727 |
| 5676 | Waterbury | 4,776 |
| 5677 | Waterbury Center | 2,357 |
| 5673 | Waitsfield | 2,284 |
| 5667 | Plainfield | 2,257 |
| 5660 | Moretown | 1,909 |
| 5674 | Warren | 1,736 |
| 5651 | East Montpelier | 1,546 |
| 5658 | Marshfield | 1,521 |
| 5682 | Worcester | 1,238 |
| 5647 | Cabot | 1,214 |
| 5669 | Roxbury | 918 |
| 5650 | East Calais | 902 |
| 5648 | Calais | 569 |
| 5640 | Adamant | 251 |
| 5681 | Woodbury | 150 |
| 5678 | Websterville | 84 |
| 5666 | North Montpelier | 36 |
| 5670 | South Barre | 31 |
| 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).