27 ZIP Codes
| Zip Code | City | Population ↓ |
|---|---|---|
| 08873 | Somerset | 56,327 |
| 08844 | Hillsborough | 44,463 |
| 08807 | Bridgewater | 39,560 |
| 07920 | Basking Ridge | 28,753 |
| 08876 | Somerville | 23,380 |
| 07059 | Warren | 16,811 |
| 08812 | Dunellen | 14,224 |
| 08805 | Bound Brook | 14,066 |
| 08502 | Belle Mead | 11,849 |
| 08835 | Manville | 10,921 |
| 08823 | Franklin Park | 8,884 |
| 08869 | Raritan | 8,368 |
| 07924 | Bernardsville | 7,713 |
| 07921 | Bedminster | 7,700 |
| 08558 | Skillman | 7,648 |
| 07069 | Watchung | 6,623 |
| 08853 | Neshanic Station | 5,634 |
| 08880 | South Bound Brook | 4,867 |
| 08836 | Martinsville | 3,855 |
| 07931 | Far Hills | 2,985 |
| 07934 | Gladstone | 1,293 |
| 07977 | Peapack | 917 |
| 08553 | Rocky Hill | 819 |
| 07939 | Lyons | 322 |
| 08528 | Kingston | 321 |
| 08821 | Flagtown | 283 |
| 08890 | Zarephath | 17 |
The data shown reflect ZCTAs from the US Census. As of 2025, there are 27 ZCTAs in Somerset County, New Jersey (US Census).