| Zip Code | City | Population ↓ |
|---|---|---|
| 3766 | Lebanon | 10,334 |
| 3755 | Hanover | 10,170 |
| 3264 | Plymouth | 6,917 |
| 3561 | Littleton | 6,021 |
| 3222 | Bristol | 5,894 |
| 3748 | Enfield | 4,547 |
| 3784 | West Lebanon | 4,181 |
| 3741 | Canaan | 4,164 |
| 3223 | Campton | 3,380 |
| 3285 | Thornton | 2,715 |
| 3585 | Lisbon | 2,557 |
| 3574 | Bethlehem | 2,528 |
| 3217 | Ashland | 2,239 |
| 3785 | Woodsville | 2,154 |
| 3245 | Holderness | 2,125 |
| 3266 | Rumney | 1,929 |
| 3774 | North Haverhill | 1,770 |
| 3768 | Lyme | 1,684 |
| 3251 | Lincoln | 1,474 |
| 3580 | Franconia | 1,425 |
| 3777 | Orford | 1,313 |
| 3240 | Grafton | 1,200 |
| 3262 | North Woodstock | 1,194 |
| 3241 | Hebron | 1,144 |
| 3282 | Wentworth | 1,083 |
| 3740 | Bath | 1,077 |
| 3750 | Etna | 1,035 |
| 3771 | Monroe | 856 |
| 3779 | Piermont | 849 |
| 3279 | Warren | 763 |
| 3780 | Pike | 637 |
| 3586 | Sugar Hill | 633 |
| 3765 | Haverhill | 469 |
| 3215 | Waterville Valley | 248 |
| 3238 | Glencliff | 81 |
| 3293 | Woodstock | 57 |
The data shown reflect ZCTAs from the US Census. As of 2024, there are 36 ZCTAs in Grafton County, New Hampshire (US Census).