16 zips
| Zip Code | City | Population ↓ |
|---|---|---|
| 5819 | Saint Johnsbury | 9,383 |
| 5851 | Lyndonville | 5,933 |
| 5843 | Hardwick | 2,414 |
| 5828 | Danville | 2,102 |
| 5836 | East Hardwick | 1,371 |
| 5046 | Groton | 1,323 |
| 5871 | West Burke | 1,306 |
| 5832 | East Burke | 1,157 |
| 5821 | Barnet | 949 |
| 5866 | Sheffield | 780 |
| 5873 | West Danville | 672 |
| 5042 | East Ryegate | 669 |
| 5867 | Sutton | 598 |
| 5862 | Peacham | 349 |
| 5850 | Lyndon Center | 308 |
| 5050 | McIndoe Falls | 118 |
The data shown reflect ZCTAs from the US Census. As of 2024, there are 16 ZCTAs in Caledonia County, Vermont (US Census).