16 ZIP Codes
| Zip Code | City | Population ↓ |
|---|---|---|
| 05819 | Saint Johnsbury | 9,106 |
| 05851 | Lyndonville | 6,024 |
| 05843 | Hardwick | 2,198 |
| 05828 | Danville | 2,092 |
| 05836 | East Hardwick | 1,531 |
| 05871 | West Burke | 1,524 |
| 05046 | Groton | 1,241 |
| 05821 | Barnet | 1,109 |
| 05832 | East Burke | 969 |
| 05873 | West Danville | 864 |
| 05866 | Sheffield | 684 |
| 05867 | Sutton | 634 |
| 05042 | East Ryegate | 602 |
| 05862 | Peacham | 361 |
| 05850 | Lyndon Center | 307 |
| 05050 | McIndoe Falls | 209 |
The data shown reflect ZCTAs from the US Census. As of 2025, there are 16 ZCTAs in Caledonia County, Vermont (US Census).