Feature Name | Class | Elev. meters | County | Latitude DMS | Longitude DMS |
| Community Chapel | Church | 53 | Hillsborough | 42 46 38 N | 071 29 20 W |
| Community Church | Church | 424 | Grafton | 44 13 05 N | 071 47 35 W |
| Community Church of Christ | Church | 286 | Grafton | 44 13 34 N | 071 44 57 W |
| Community Church of Durham | Church | 20 | Strafford | 43 07 59 N | 070 55 23 W |
| Comstock Hill | Summit | 431 | Coos | 45 04 09 N | 071 26 10 W |
| Conant Elementary School | School | 88 | Merrimack | 43 11 17 N | 071 32 33 W |
| Conant Hill | Summit | 464 | Hillsborough | 42 47 06 N | 071 53 59 W |
| Conant Public Library | Building | 133 | Cheshire | 42 46 28 N | 072 23 01 W |
| Concord | Populated Place | 85 | Merrimack | 43 12 29 N | 071 32 15 W |
| Concord Christian School | School | 87 | Merrimack | 43 12 10 N | 071 32 15 W |
| Concord City Hall | Building | 87 | Merrimack | 43 12 22 N | 071 32 24 W |
| Concord Civic District | Park | 86 | Merrimack | 43 12 27 N | 071 32 18 W |
| Concord Fire Department | Building | 86 | Merrimack | 43 12 17 N | 071 32 18 W |
| Concord Granite Quarries | Mine | 204 | Merrimack | 43 14 10 N | 071 34 23 W |
| Concord Heights | Populated Place | 104 | Merrimack | 43 12 45 N | 071 30 35 W |
| Concord Historic District | Park | 78 | Merrimack | 43 12 57 N | 071 32 28 W |
| Concord Hospital | Hospital | 117 | Merrimack | 43 11 52 N | 071 33 42 W |
| Concord Hospital Heliport | Airport | 118 | Merrimack | 43 11 53 N | 071 33 44 W |
| Concord Manor | Populated Place | 110 | Merrimack | 43 16 00 N | 071 34 58 W |
| Concord Municipal Airport | Airport | 102 | Merrimack | 43 12 12 N | 071 30 05 W |
| Concord Plains | Flat | 109 | Merrimack | 43 13 28 N | 071 30 19 W |
| Concord Point | Cape | 0 | Rockingham | 43 01 00 N | 070 43 55 W |
| Concord Post Office | Post Office | 87 | Merrimack | 43 12 08 N | 071 32 23 W |
| Concord Public Library | Building | 86 | Merrimack | 43 12 08 N | 071 32 19 W |
| Concord Senior High School | School | 101 | Merrimack | 43 12 02 N | 071 33 05 W |
| Concord Water Works Dam | Dam | 123 | Merrimack | 43 14 36 N | 071 34 40 W |
| Concordia Lutheran Church | Church | 81 | Merrimack | 43 12 54 N | 071 32 31 W |
| Condon Cor | Locale | 331 | Sullivan | 43 11 44 N | 072 23 19 W |
| Cone Brook | Stream | | Coos | 44 48 43 N | 071 34 26 W |
| Cone Mountain | Summit | 531 | Grafton | 43 54 51 N | 071 36 32 W |
| Cone Pond | Lake | 508 | Grafton | 43 54 13 N | 071 36 23 W |
| Cone School | School | 318 | Coos | 44 49 19 N | 071 33 38 W |
| Cones | Populated Place | 314 | Coos | 44 49 11 N | 071 33 57 W |
| Conference Church Camp | Locale | 365 | Cheshire | 42 50 32 N | 072 04 38 W |
| Congregation Ahavas Achim | Church | 157 | Cheshire | 42 56 45 N | 072 19 29 W |
| Congregational Center | Building | 156 | Merrimack | 43 09 55 N | 071 28 13 W |
| Congregational Church of Hollis | Church | 120 | Hillsborough | 42 44 23 N | 071 35 20 W |
| Conleys Grove | Populated Place | 69 | Rockingham | 42 51 27 N | 071 12 29 W |
| Connary Brook | Stream | | Coos | 44 40 32 N | 071 35 01 W |
| Connecticut Groveton Dam | Dam | 329 | Coos | 44 33 30 N | 071 33 10 W |
| Connecticut Lakes | Lake | 498 | Coos | 45 05 00 N | 071 14 58 W |
| Connecticut Lakes State Forest | Forest | 620 | Coos | 45 11 10 N | 071 11 15 W |
| Connecticut River Reservoir | Reservoir | 66 | Cheshire | 42 46 18 N | 072 30 46 W |
| Connecticut River Reservoir | Reservoir | 83 | Cheshire | 43 08 18 N | 072 26 46 W |
| Connecticut River Reservoir | Reservoir | 329 | Coos | 44 33 30 N | 071 33 10 W |
| Connecticut River Reservoir | Reservoir | 600 | Coos | 45 11 24 N | 071 11 22 W |
| Connecticut River Reservoir | Reservoir | 122 | Grafton | 44 12 30 N | 072 03 28 W |
| Connecticut River Reservoir | Reservoir | 165 | Grafton | 44 19 30 N | 072 00 04 W |
| Connecticut River Reservoir | Reservoir | 113 | Grafton | 43 40 00 N | 072 18 10 W |
| Connecticut River State Park | Park | 263 | Sullivan | 43 13 15 N | 072 24 58 W |
| Conner Pond | Lake | 274 | Carroll | 43 46 43 N | 071 14 04 W |
| Connor Brook | Stream | | Coos | 44 23 10 N | 071 01 14 W |
| Consant School | School | 88 | Merrimack | 43 11 17 N | 071 32 35 W |
| Contention Pond | Lake | 263 | Hillsborough | 43 10 06 N | 071 57 58 W |
| Contoocook | Populated Place | 110 | Merrimack | 43 13 19 N | 071 42 50 W |
| Contoocook Cemetery | Cemetery | 117 | Merrimack | 43 13 23 N | 071 42 25 W |
| Contoocook Covered Bridge | Bridge | 107 | Merrimack | 43 13 23 N | 071 42 50 W |
| Contoocook Lake | Reservoir | 307 | Cheshire | 42 48 03 N | 072 01 36 W |
| Contoocook Lake Dam | Dam | 307 | Cheshire | 42 48 03 N | 072 01 36 W |
| Contoocook Mills Industrial Site (historical) | Locale | 178 | Hillsborough | 43 06 43 N | 071 53 46 W |
| Contoocook Park | Park | 109 | Merrimack | 43 16 08 N | 071 36 37 W |
| Contoocook River | Stream | | Merrimack | 43 17 11 N | 071 35 23 W |
| Contoocook River Reservoir | Reservoir | 214 | Hillsborough | 42 53 54 N | 071 56 28 W |
| Contoocook River Reservoir | Reservoir | 206 | Hillsborough | 43 00 00 N | 071 55 34 W |
| Contoocook River Reservoir | Reservoir | 201 | Hillsborough | 43 00 12 N | 071 55 28 W |
| Contoocook River Reservoir | Reservoir | 227 | Hillsborough | 42 51 36 N | 071 57 40 W |
| Contoocook River Reservoir | Reservoir | 127 | Merrimack | 43 11 24 N | 071 44 58 W |
| Contoocook River Reservoir | Reservoir | 111 | Merrimack | 43 13 18 N | 071 42 58 W |
| Contoocook River Reservoir | Reservoir | 106 | Merrimack | 43 16 12 N | 071 36 46 W |
| Contoocook State Forest | Forest | 133 | Merrimack | 43 10 51 N | 071 45 12 W |
| Contoocook Valley Paper Company Dam | Dam | 140 | Merrimack | 43 10 06 N | 071 50 22 W |
| Contoocook Village Dam | Dam | 111 | Merrimack | 43 13 18 N | 071 42 58 W |
| Conval Regional High School | School | 227 | Hillsborough | 42 54 35 N | 071 56 28 W |
| Converse Meadow Pond | Lake | 332 | Cheshire | 42 44 40 N | 071 58 33 W |
| Converse Pond | Lake | 364 | Cheshire | 43 04 29 N | 072 14 42 W |
| Converseville | Populated Place | 333 | Cheshire | 42 44 21 N | 071 58 49 W |
| Conway | Populated Place | 140 | Carroll | 43 58 45 N | 071 07 13 W |
| Conway Crossing Factory Stores Shopping Center | Locale | 152 | Carroll | 43 59 07 N | 071 06 45 W |
| Conway Elementary School | School | 140 | Carroll | 43 58 48 N | 071 07 25 W |
| Conway Lake | Reservoir | 133 | Carroll | 43 59 06 N | 071 03 10 W |
| Conway Lake Dam | Dam | 133 | Carroll | 43 59 06 N | 071 03 10 W |
| Conway Post Office | Post Office | 140 | Carroll | 43 58 42 N | 071 07 11 W |
| Conway Public Library | Building | 143 | Carroll | 43 58 43 N | 071 07 02 W |
| Conway State Forest | Park | 419 | Carroll | 44 04 08 N | 071 03 38 W |
| Conway Village Cemetery | Cemetery | 139 | Carroll | 43 59 36 N | 071 03 27 W |
| Conway Village Chamber of Commerce | Locale | 140 | Carroll | 43 58 43 N | 071 07 36 W |
| Conway Village Congregational Church | Church | 140 | Carroll | 43 58 44 N | 071 07 21 W |
| Cook Auditorium | Building | 152 | Grafton | 43 42 18 N | 072 17 42 W |
| Cook Brook | Stream | | Carroll | 43 47 27 N | 071 26 40 W |
| Cook Hill | Summit | 369 | Cheshire | 42 44 05 N | 072 13 20 W |
| Cook Hill | Summit | 362 | Cheshire | 43 08 30 N | 072 20 45 W |
| Cook Path | Trail | 753 | Coos | 44 24 10 N | 071 17 09 W |
| Cooks Crossing | Populated Place | 189 | Carroll | 44 05 23 N | 071 12 20 W |
| Cooks Hill | Summit | 299 | Carroll | 43 37 06 N | 071 01 47 W |
| Cooks Point | Cape | 154 | Carroll | 43 40 08 N | 071 23 56 W |
| Cooks Pond | Lake | 143 | Carroll | 43 51 27 N | 071 09 07 W |
| Cooley Hill | Summit | 753 | Grafton | 44 09 15 N | 071 49 21 W |
| Coolidge Brook | Stream | | Coos | 45 02 12 N | 071 27 05 W |
| Coolidge Cemetery | Cemetery | 241 | Hillsborough | 43 08 39 N | 071 57 25 W |
| Coombs Bridge | Bridge | 136 | Cheshire | 42 50 31 N | 072 21 09 W |
| Coombs Pond | Reservoir | 22 | Rockingham | 43 01 15 N | 070 49 17 W |
| Coon Brook | Stream | | Coos | 45 07 06 N | 071 13 20 W |
| Coon Brook Bog | Reservoir | 599 | Coos | 45 08 30 N | 071 14 58 W |
| Coon Brook Bog | Swamp | 600 | Coos | 45 08 39 N | 071 15 10 W |
| Coon Brook Bog Dam | Dam | 599 | Coos | 45 08 30 N | 071 14 58 W |
| Cooney Hollow | Valley | | Sullivan | 43 32 29 N | 072 20 28 W |
| Cooper Farm Landing Strip | Airport | 149 | Merrimack | 43 16 41 N | 071 27 14 W |
| Cooper Hill | Summit | 376 | Cheshire | 42 54 12 N | 072 10 24 W |
| Cooper Hill | Summit | 182 | Rockingham | 43 11 15 N | 071 07 17 W |
| Coos County | Civil | 381 | Coos | 44 38 00 N | 071 18 58 W |