Post Offices List in Portsmouth City, New Hampshire:
| Portsmouth Post Office | 345 Heritage Ave Unit 100, Portsmouth, NH 03801 |
| Portsmouth Naval Shipyard Post Office | 15 Mcdonough St, Portsmouth, NH 03804 |
| Portsmouth Post Office | 345 Heritage Ave Unit 100, Portsmouth, NH 03801 |
| Portsmouth Naval Shipyard Post Office | 15 Mcdonough St, Portsmouth, NH 03804 |