Zip Code | City | Population |
|---|---|---|
| 07840 | Hackettstown | 32,952 |
| 08865 | Phillipsburg | 30,561 |
| 07882 | Washington | 14,670 |
| 07825 | Blairstown | 9,723 |
| 07823 | Belvidere | 7,644 |
| 08886 | Stewartsville | 6,963 |
| 07863 | Oxford | 3,582 |
| 07838 | Great Meadows | 3,190 |
| 07832 | Columbia | 3,175 |
| 07865 | Port Murray | 2,533 |
| 07880 | Vienna | 357 |
| 07833 | Delaware | 112 |
| 07844 | Hope | 104 |
| 07831 | Changewater | 30 |
| 07846 | Johnsonburg | 22 |
| 07820 | Allamuchy | 1 |