| Connecticut River - Vernon Dam | NH | Impoundment | Not Supporting | 1 | 2,000 |
| Conner Pond | NH | Lake/Reservoir/Pond | Not Supporting | 2 | 85 |
| Conservation Pond | NH | Lake/Reservoir/Pond | Not Supporting | 2 | 11 |
| Conservation Pond Dam | NH | Impoundment | Not Supporting | 1 | 0.33 |
| Constance Lake | NH | Lake/Reservoir/Pond | Not Supporting | 3 | 8.02 |
| Contention Pond | NH | Lake/Reservoir/Pond | Not Supporting | 2 | 94 |
| Contoocook Lake | NH | Impoundment | Not Supporting | 1 | 116 |
| Contoocook Lake | NH | Lake/Reservoir/Pond | Not Supporting | 3 | 227 |
| Contoocook Lake - Town Beach | NH | Lake/Reservoir/Pond | Not Supporting | 1 | 1.28 |
| Contoocook River | NH | Impoundment | Not Supporting | 4 | 0.50 |
| Contoocook River - Camp Spaulding Beach | NH | Impoundment | Not Supporting | 1 | 1.38 |
| Contoocook River - Contoocook Village Dam | NH | Impoundment | Not Supporting | 1 | 110 |
| Contoocook River - Hoague-Sprague Dam | NH | Impoundment | Not Supporting | 1 | 2.00 |
| Contoocook River - Hopkinton Flood Control Dam | NH | Impoundment | Not Supporting | 1 | 220 |
| Contoocook River - Hosiery Mill Dam | NH | Impoundment | Not Supporting | 1 | 8.00 |
| Contoocook River - Monadnock Power Dam Pond | NH | Impoundment | Not Supporting | 1 | 40 |
| Contoocook River - Noone Mill Pond | NH | Impoundment | Not Supporting | 2 | 18 |
| Contoocook River - North Village Dam | NH | Impoundment | Not Supporting | 1 | 17 |
| Contoocook River - Paper Mill Dam | NH | Impoundment | Not Supporting | 1 | 5.00 |
| Contoocook River - Penacook Lower Falls | NH | Impoundment | Not Supporting | 2 | 8.50 |
| Contoocook River - Penacook Upper Falls Dam | NH | Impoundment | Not Supporting | 2 | 11 |
| Contoocook River - Pierce Power Dam | NH | Impoundment | Not Supporting | 2 | 3.50 |
| Contoocook River - Transcript Printing Co Dam | NH | Impoundment | Not Supporting | 2 | 2.50 |
| Contoocook River - York Dam Pond | NH | Impoundment | Not Supporting | 1 | 250 |
| Contoocook River Dam | NH | Impoundment | Not Supporting | 4 | 5.00 |
| Conway Lake | NH | Lake/Reservoir/Pond | Not Supporting | 2 | 1,313 |
| Conway Lake - Town Beach | NH | Lake/Reservoir/Pond | Not Supporting | 1 | 0.51 |
| Cooks Pond | NH | Lake/Reservoir/Pond | Not Supporting | 1 | 33 |
| Cooks Pond | NH | Lake/Reservoir/Pond | Not Supporting | 2 | 246 |
| Coon Brook- Coon Brook Bog Dam | NH | Impoundment | Not Supporting | 1 | 19 |
| Copps Pond Dam - Wingate Brook | NH | Impoundment | Not Supporting | 1 | 94 |
| Corey Pond | NH | Lake/Reservoir/Pond | Not Supporting | 1 | 8.74 |
| Cornelius Pond | NH | Lake/Reservoir/Pond | Not Supporting | 1 | 16 |
| Corser Pond | NH | Lake/Reservoir/Pond | Not Supporting | 3 | 4.78 |
| Country Club Dam | NH | Impoundment | Not Supporting | 1 | 0.30 |
| Country Club Pond | NH | Impoundment | Not Supporting | 1 | 2.82 |
| Country Pond | NH | Lake/Reservoir/Pond | Not Supporting | 5 | 305 |
| Country Pond - Lone Tree Scout Resv. Beach | NH | Lake/Reservoir/Pond | Not Supporting | 2 | 1.38 |
| Country Pond - Tasker Day Camp Beach | NH | Lake/Reservoir/Pond | Not Supporting | 2 | 1.38 |
| Country Pond - Town Beach | NH | Lake/Reservoir/Pond | Not Supporting | 2 | 0.39 |
| Countryside Village Det Pond Dam | NH | Impoundment | Not Supporting | 1 | 1.00 |
| Cranberry Bog Pond | NH | Lake/Reservoir/Pond | Not Supporting | 2 | 4.02 |
| Cranberry Meadow Brook | NH | Impoundment | Not Supporting | 1 | 0.20 |
| Cranberry Meadow Pond | NH | Lake/Reservoir/Pond | Not Supporting | 1 | 41 |
| Cranberry Pond | NH | Lake/Reservoir/Pond | Not Supporting | 1 | 2.07 |
| Cranberry Pond | NH | Lake/Reservoir/Pond | Not Supporting | 2 | 21 |
| Crane Neck Pond | NH | Lake/Reservoir/Pond | Not Supporting | 1 | 29 |
| Crane Pond | NH | Lake/Reservoir/Pond | Not Supporting | 1 | 8.09 |
| Craney Pond | NH | Lake/Reservoir/Pond | Not Supporting | 1 | 47 |
| Crawford Brook - Recreation Lake | NH | Impoundment | Not Supporting | 1 | 7.00 |