| Localité | Code postal |
|---|---|
| North Plainfield, Somerset | 07060, 07062, 07063 |
| Peapack, Somerset | 07977 |
| Plainfield, Somerset | 07069 |
| Pluckemin, Somerset | 07978 |
| Raritan, Somerset | 08869 |
| Rocky Hill, Somerset | 08553 |
| Skillman, Somerset | 08558 |
| Somerset, Somerset | 08873, 08875 |
| Somerville, Somerset | 08876 |
| South Bound Brook, Somerset | 08880 |
| South Branch, Somerset | 08876 |
| Warren, Somerset | 07059 |
| Watchung, Somerset | 07069 |
| Zarepath, Somerset | 08873 |
| Zarephath, Somerset | 08890 |