27 zips
| Zip Code | City | Population ↓ |
|---|---|---|
| 08873 | Somerset | 55,862 |
| 08844 | Hillsborough | 43,708 |
| 08807 | Bridgewater | 38,438 |
| 07920 | Basking Ridge | 28,390 |
| 08876 | Somerville | 22,902 |
| 07059 | Warren | 16,433 |
| 08812 | Dunellen | 14,177 |
| 08805 | Bound Brook | 14,153 |
| 08502 | Belle Mead | 12,081 |
| 08835 | Manville | 10,870 |
| 08823 | Franklin Park | 8,873 |
| 08869 | Raritan | 8,192 |
| 07924 | Bernardsville | 7,756 |
| 07921 | Bedminster | 7,563 |
| 08558 | Skillman | 7,236 |
| 07069 | Watchung | 6,545 |
| 08853 | Neshanic Station | 5,415 |
| 08880 | South Bound Brook | 4,833 |
| 08836 | Martinsville | 4,326 |
| 07931 | Far Hills | 3,271 |
| 07934 | Gladstone | 1,406 |
| 08553 | Rocky Hill | 814 |
| 07977 | Peapack | 733 |
| 07939 | Lyons | 380 |
| 08821 | Flagtown | 375 |
| 08528 | Kingston | 331 |
| 08890 | Zarephath | 38 |
The data shown reflect ZCTAs from the US Census. As of 2024, there are 27 ZCTAs in Somerset County, New Jersey (US Census).