20 zips
| Zip Code | City | Population ↓ |
|---|---|---|
| 8822 | Flemington | 31,330 |
| 8889 | Whitehouse Station | 10,383 |
| 8833 | Lebanon | 9,057 |
| 8848 | Milford | 8,295 |
| 8530 | Lambertville | 8,114 |
| 7830 | Califon | 7,748 |
| 8801 | Annandale | 7,665 |
| 8809 | Clinton | 6,838 |
| 8867 | Pittstown | 5,819 |
| 8551 | Ringoes | 5,746 |
| 8826 | Glen Gardner | 5,186 |
| 8559 | Stockton | 4,902 |
| 8825 | Frenchtown | 4,556 |
| 8802 | Asbury | 4,380 |
| 8827 | Hampton | 3,710 |
| 8829 | High Bridge | 3,564 |
| 8804 | Bloomsbury | 3,116 |
| 8887 | Three Bridges | 1,411 |
| 7979 | Pottersville | 246 |
| 8858 | Oldwick | 0 |
The data shown reflect ZCTAs from the US Census. As of 2024, there are 20 ZCTAs in Hunterdon County, New Jersey (US Census).