28 zips
| Zip Code | City | Population ↓ |
|---|---|---|
| 3301 | Concord | 33,986 |
| 3303 | Concord | 16,118 |
| 3106 | Hooksett | 14,654 |
| 3275 | Suncook | 12,028 |
| 3235 | Franklin | 8,827 |
| 3276 | Tilton | 8,811 |
| 3304 | Bow | 8,235 |
| 3242 | Henniker | 6,094 |
| 3229 | Contoocook | 5,925 |
| 3307 | Loudon | 5,638 |
| 3234 | Epsom | 4,846 |
| 3257 | New London | 4,381 |
| 3263 | Pittsfield | 4,093 |
| 3278 | Warner | 3,003 |
| 3046 | Dunbarton | 3,000 |
| 3258 | Chichester | 2,659 |
| 3224 | Canterbury | 2,343 |
| 3221 | Bradford | 2,263 |
| 3216 | Andover | 2,041 |
| 3255 | Newbury | 1,899 |
| 3268 | Salisbury | 1,507 |
| 3287 | Wilmot | 1,502 |
| 3230 | Danbury | 1,491 |
| 3260 | North Sutton | 995 |
| 3243 | Hill | 902 |
| 3273 | South Sutton | 309 |
| 3233 | Elkins | 209 |
| 3231 | East Andover | 110 |
The data shown reflect ZCTAs from the US Census. As of 2024, there are 28 ZCTAs in Merrimack County, New Hampshire (US Census).