34 ZIP Codes
| Zip Code | City | Population ↓ |
|---|---|---|
| 03103 | Manchester | 37,775 |
| 03104 | Manchester | 35,237 |
| 03102 | Manchester | 33,959 |
| 03060 | Nashua | 31,657 |
| 03062 | Nashua | 29,441 |
| 03054 | Merrimack | 28,176 |
| 03051 | Hudson | 25,557 |
| 03110 | Bedford | 23,746 |
| 03055 | Milford | 16,337 |
| 03063 | Nashua | 15,805 |
| 03076 | Pelham | 14,449 |
| 03064 | Nashua | 14,391 |
| 03045 | Goffstown | 14,080 |
| 03031 | Amherst | 11,849 |
| 03109 | Manchester | 9,929 |
| 03281 | Weare | 9,170 |
| 03049 | Hollis | 8,603 |
| 03052 | Litchfield | 8,499 |
| 03244 | Hillsborough | 8,156 |
| 03458 | Peterborough | 6,872 |
| 03070 | New Boston | 6,177 |
| 03033 | Brookline | 5,736 |
| 03071 | New Ipswich | 5,310 |
| 03086 | Wilton | 4,258 |
| 03048 | Greenville | 3,237 |
| 03101 | Manchester | 3,201 |
| 03057 | Mont Vernon | 2,709 |
| 03440 | Antrim | 2,661 |
| 03449 | Hancock | 1,838 |
| 03047 | Greenfield | 1,730 |
| 03442 | Bennington | 1,588 |
| 03082 | Lyndeborough | 1,531 |
| 03043 | Francestown | 1,398 |
| 03084 | Temple | 1,363 |
The data shown reflect ZCTAs from the US Census. As of 2025, there are 34 ZCTAs in Hillsborough County, New Hampshire (US Census).