27 zips
| Zip Code | City | Population ↓ |
|---|---|---|
| 8873 | Somerset | 55,342 |
| 8844 | Hillsborough | 43,077 |
| 8807 | Bridgewater | 38,585 |
| 7920 | Basking Ridge | 28,460 |
| 8876 | Somerville | 22,531 |
| 7059 | Warren | 16,208 |
| 8805 | Bound Brook | 14,173 |
| 8812 | Dunellen | 14,054 |
| 8502 | Belle Mead | 11,603 |
| 8835 | Manville | 10,892 |
| 8823 | Franklin Park | 9,024 |
| 8869 | Raritan | 8,301 |
| 7924 | Bernardsville | 7,746 |
| 7921 | Bedminster | 7,573 |
| 8558 | Skillman | 7,515 |
| 7069 | Watchung | 6,651 |
| 8853 | Neshanic Station | 5,349 |
| 8880 | South Bound Brook | 4,838 |
| 8836 | Martinsville | 4,023 |
| 7931 | Far Hills | 3,399 |
| 7934 | Gladstone | 1,575 |
| 8553 | Rocky Hill | 794 |
| 7977 | Peapack | 689 |
| 8821 | Flagtown | 514 |
| 7939 | Lyons | 330 |
| 8528 | Kingston | 163 |
| 8890 | Zarephath | 74 |
The data shown reflect ZCTAs from the US Census. As of 2024, there are 27 ZCTAs in Somerset County, New Jersey (US Census).