28 zips
| Zip Code | City | Population ↓ |
|---|---|---|
| 3301 | Concord | 33,987 |
| 3303 | Concord | 16,368 |
| 3106 | Hooksett | 14,923 |
| 3275 | Suncook | 12,115 |
| 3276 | Tilton | 9,046 |
| 3235 | Franklin | 8,843 |
| 3304 | Bow | 8,295 |
| 3242 | Henniker | 6,161 |
| 3229 | Contoocook | 5,976 |
| 3307 | Loudon | 5,683 |
| 3234 | Epsom | 4,896 |
| 3257 | New London | 4,503 |
| 3263 | Pittsfield | 4,094 |
| 3046 | Dunbarton | 3,055 |
| 3278 | Warner | 3,024 |
| 3258 | Chichester | 2,693 |
| 3224 | Canterbury | 2,458 |
| 3221 | Bradford | 2,210 |
| 3216 | Andover | 2,105 |
| 3255 | Newbury | 1,957 |
| 3230 | Danbury | 1,539 |
| 3268 | Salisbury | 1,469 |
| 3287 | Wilmot | 1,424 |
| 3243 | Hill | 924 |
| 3260 | North Sutton | 908 |
| 3273 | South Sutton | 277 |
| 3233 | Elkins | 171 |
| 3231 | East Andover | 80 |
The data shown reflect ZCTAs from the US Census. As of 2024, there are 28 ZCTAs in Merrimack County, New Hampshire (US Census).