| Zip Code | City | Population ↓ |
|---|---|---|
| 7860 | Newton | 26,507 |
| 7871 | Sparta | 21,020 |
| 7461 | Sussex | 18,275 |
| 7843 | Hopatcong | 11,102 |
| 7419 | Hamburg | 9,927 |
| 7821 | Andover | 9,571 |
| 7874 | Stanhope | 8,534 |
| 7462 | Vernon | 6,712 |
| 7416 | Franklin | 5,736 |
| 7826 | Branchville | 5,529 |
| 7422 | Highland Lakes | 5,401 |
| 7848 | Lafayette | 4,425 |
| 7827 | Montague | 4,117 |
| 7460 | Stockholm | 3,131 |
| 7418 | Glenwood | 2,473 |
| 7439 | Ogdensburg | 2,215 |
| 7822 | Augusta | 947 |
| 7851 | Layton | 363 |
| 7881 | Wallpack Center | 8 |
The data shown reflect ZCTAs from the US Census. As of 2024, there are 19 ZCTAs in Sussex County, New Jersey (US Census).