| No Name Brook II | NH | Impoundment | Not Supporting | 1 | 0.51 |
| Norcross Pond | NH | Lake/Reservoir/Pond | Not Supporting | 1 | 8.74 |
| Norris Brook | NH | Impoundment | Not Supporting | 1 | 0.21 |
| Norris Brook - Farm Pond | NH | Impoundment | Not Supporting | 1 | 0.55 |
| North Branch - Contoocook River Loverin Dam | NH | Impoundment | Not Supporting | 1 | 2.50 |
| North Branch - Interlocken Dam | NH | Impoundment | Not Supporting | 1 | 2.50 |
| North Branch - Robb Reservoir | NH | Impoundment | Not Supporting | 1 | 96 |
| North Branch - Williams Dam | NH | Impoundment | Not Supporting | 2 | 55 |
| North Branch Gale River - Littleton Reservoir | NH | Impoundment | Not Supporting | 1 | 0.50 |
| North Branch Millers River - Mill Pond | NH | Impoundment | Not Supporting | 1 | 6.97 |
| North Branch Millers River - Miller River | NH | Impoundment | Not Supporting | 1 | 6.50 |
| North Branch Sugar River - Bernhardy Dam | NH | Impoundment | Not Supporting | 1 | 1.55 |
| North Branch Sugar River - Morgan Pond Brook | NH | Impoundment | Not Supporting | 1 | 0.49 |
| North Charlestown Reservoir | NH | Impoundment | Not Supporting | 1 | 0.37 |
| North Pond | NH | Lake/Reservoir/Pond | Not Supporting | 2 | 56 |
| North Pond | NH | Lake/Reservoir/Pond | Not Supporting | 1 | 22 |
| North Pond | NH | Lake/Reservoir/Pond | Not Supporting | 1 | 22 |
| North River Pond | NH | Lake/Reservoir/Pond | Not Supporting | 3 | 84 |
| North Round Pond | NH | Lake/Reservoir/Pond | Not Supporting | 1 | 12 |
| Northeast Pond | NH | Lake/Reservoir/Pond | Not Supporting | 2 | 285 |
| Northwood Lake | NH | Lake/Reservoir/Pond | Not Supporting | 5 | 651 |
| Northwood Lake - Camp Wah-Tut-Ca Beach | NH | Lake/Reservoir/Pond | Not Supporting | 1 | 1.38 |
| Northwood Lake - Lynn Grove Association Beach | NH | Lake/Reservoir/Pond | Not Supporting | 2 | 0.17 |
| Northwood Lake - Town Beach | NH | Lake/Reservoir/Pond | Not Supporting | 3 | 0.36 |
| Norton Pond | NH | Lake/Reservoir/Pond | Not Supporting | 1 | 11 |
| Norway Pond | NH | Lake/Reservoir/Pond | Not Supporting | 2 | 39 |
| Norway Pond - Town Beach | NH | Lake/Reservoir/Pond | Not Supporting | 1 | 1.14 |
| Nottingham Lake | NH | Lake/Reservoir/Pond | Not Supporting | 1 | 35 |
| Nubanusit Brook | NH | Impoundment | Not Supporting | 1 | 0.42 |
| Nubanusit Brook | NH | Impoundment | Not Supporting | 1 | 0.02 |
| Nubanusit Brook - Bell Mill | NH | Impoundment | Not Supporting | 1 | 0.59 |
| Nubanusit Brook - Elm Street Dam | NH | Impoundment | Not Supporting | 1 | 0.70 |
| Nubanusit Brook - Gurnsey Dam | NH | Impoundment | Not Supporting | 1 | 0.52 |
| Nubanusit Brook - Union Street Dam | NH | Impoundment | Not Supporting | 1 | 0.51 |
| Nubanusit Brook - Verney Mill Dam | NH | Impoundment | Not Supporting | 1 | 2.10 |
| Nubanusit Lake | NH | Lake/Reservoir/Pond | Not Supporting | 2 | 716 |
| Nubble Pond | NH | Lake/Reservoir/Pond | Not Supporting | 1 | 2.71 |
| Number Nine Brook - Diversion Pond Dam | NH | Impoundment | Not Supporting | 1 | 3.00 |
| Nutt Pond | NH | Lake/Reservoir/Pond | Not Supporting | 7 | 18 |
| O'brien Recreation Dam | NH | Lake/Reservoir/Pond | Not Supporting | 1 | 15 |
| Occom Pond | NH | Lake/Reservoir/Pond | Not Supporting | 1 | 8.37 |
| Odiorne Pond | NH | Lake/Reservoir/Pond | Not Supporting | 2 | 18 |
| Ogontz Brook | NH | Impoundment | Not Supporting | 1 | 0.02 |
| Ogontz Lake | NH | Lake/Reservoir/Pond | Not Supporting | 1 | 74 |
| Ogontz Lake - Ogontz Equestrian Ctr/Camp Beach | NH | Lake/Reservoir/Pond | Not Supporting | 1 | 1.38 |
| Old Maids Brook - Mclaughlin Dam | NH | Impoundment | Not Supporting | 1 | 1.50 |
| Old Maids Brook - Spit Brook | NH | Impoundment | Not Supporting | 1 | 1.50 |
| Old Miller Pond Dam | NH | Impoundment | Not Supporting | 1 | 1.24 |
| Old Millpond | NH | Impoundment | Not Supporting | 1 | 5.12 |
| Old River - Car Barn Pond | NH | Impoundment | Not Supporting | 1 | 3.98 |