Post Offices List in Somerset City, New Jersey:
| East Millstone Post Office | 11 Market St, Somerset, NJ 08873 |
| Somerset Post Office | 500 Demott Ln, Somerset, NJ 08873 |
| East Millstone Post Office | 11 Market St, Somerset, NJ 08873 |
| Somerset Post Office | 500 Demott Ln, Somerset, NJ 08873 |