Feature Name | Class | Elev. meters | County | Latitude DMS | Longitude DMS |
| Murray Park | Park | 182 | New Haven | 41 31 34 N | 073 03 34 W |
| Murray Pond Number 2 | Reservoir | 122 | Middlesex | 41 23 06 N | 072 32 22 W |
| Murray Pond Number 2 Dam | Dam | 123 | Middlesex | 41 23 06 N | 072 32 22 W |
| Murray Ponds | Lake | 119 | Middlesex | 41 23 16 N | 072 32 23 W |
| Murry Hill | Summit | 271 | Tolland | 41 56 37 N | 072 21 32 W |
| Museum of American Political Life | Building | 21 | Hartford | 41 47 54 N | 072 42 55 W |
| Museum of Fife and Drum | Building | 20 | Middlesex | 41 20 48 N | 072 26 30 W |
| Museum on the Green | Building | 13 | Hartford | 41 42 03 N | 072 36 25 W |
| Music Mountain | Summit | 381 | Litchfield | 41 54 53 N | 073 19 21 W |
| Mustard Bowl | Basin | 40 | Middlesex | 41 38 23 N | 072 38 15 W |
| Muzzy Field Park | Park | 103 | Hartford | 41 40 24 N | 072 57 36 W |
| Myer Hill | Summit | 69 | New London | 41 21 25 N | 072 19 15 W |
| Myer Huber Pond | Lake | 73 | New Haven | 41 25 03 N | 072 41 41 W |
| Myers Brook | Stream | | New London | 41 29 32 N | 072 01 23 W |
| Myers Pond | Lake | 158 | Fairfield | 41 22 09 N | 073 17 58 W |
| Myers Pond | Lake | 190 | Tolland | 41 58 47 N | 072 08 24 W |
| Myron Kinney Brook | Stream | | New London | 41 33 09 N | 071 52 13 W |
| Myrtle Beach | Populated Place | 2 | New Haven | 41 11 46 N | 073 04 35 W |
| Myrtle H Stevens School | School | 31 | Middlesex | 41 40 07 N | 072 39 23 W |
| Mystic | Populated Place | 3 | New London | 41 21 15 N | 071 57 59 W |
| Mystic Art Gallery | Building | 2 | New London | 41 21 16 N | 071 58 11 W |
| Mystic Bascule Bridge | Bridge | 0 | New London | 41 21 16 N | 071 58 08 W |
| Mystic Bridge Historic District | Park | 3 | New London | 41 21 14 N | 071 58 01 W |
| Mystic Carousel and Fun Center | Park | 9 | New London | 41 22 52 N | 071 57 30 W |
| Mystic Community Center | Building | 5 | New London | 41 20 46 N | 071 57 27 W |
| Mystic Congregational Church | Church | 1 | New London | 41 21 11 N | 071 57 52 W |
| Mystic Education Center | School | 51 | New London | 41 22 34 N | 071 58 20 W |
| Mystic Factory Outlet I Shopping Center | Locale | 4 | New London | 41 22 25 N | 071 57 41 W |
| Mystic Factory Outlet II Shopping Center | Locale | 7 | New London | 41 22 23 N | 071 57 43 W |
| Mystic Harbor | Bay | 0 | New London | 41 20 00 N | 071 58 33 W |
| Mystic Marinelife Aquarium Research Library | Building | 9 | New London | 41 22 26 N | 071 57 14 W |
| Mystic Middle School | School | 18 | New London | 41 21 29 N | 071 56 40 W |
| Mystic Post Office | Post Office | 4 | New London | 41 21 15 N | 071 58 01 W |
| Mystic Reservoir | Reservoir | 41 | New London | 41 29 06 N | 072 56 04 W |
| Mystic Reservoir | Reservoir | 15 | New London | 41 21 55 N | 071 56 08 W |
| Mystic Reservoir South Dam | Dam | 41 | New London | 41 29 06 N | 072 56 04 W |
| Mystic Ridge Subdivision Park | Park | 53 | New London | 41 22 00 N | 071 58 48 W |
| Mystic River | Stream | | New London | 41 20 59 N | 071 58 13 W |
| Mystic River Historic District | Park | 48 | New London | 41 21 05 N | 072 00 32 W |
| Mystic Seaport | Populated Place | 4 | New London | 41 21 40 N | 071 57 59 W |
| Mystic Seaport Marine Museum | Building | 0 | New London | 41 21 44 N | 071 57 54 W |
| Mystic Shipyard | Locale | 4 | New London | 41 19 43 N | 071 59 08 W |
| Mystic Station | Locale | 3 | New London | 41 21 03 N | 071 57 45 W |
| Mystic-Noank Library | Building | 30 | New London | 41 21 15 N | 071 58 30 W |
| Nameaug School | School | 10 | New London | 41 20 54 N | 072 06 21 W |
| Namerick Brook | Stream | | Hartford | 41 53 55 N | 072 36 58 W |
| Naramake Elementary School | School | 29 | Fairfield | 41 07 13 N | 073 23 26 W |
| Narragansett Trail | Trail | 123 | New London | 41 27 33 N | 071 55 54 W |
| Narragansett Trail | Trail | 121 | New London | 41 30 58 N | 071 51 19 W |
| Narrows Island | Island | 1 | New Haven | 41 15 29 N | 072 43 50 W |
| Nash Island | Island | 5 | Fairfield | 41 02 31 N | 073 29 16 W |
| Nash Pond | Lake | 21 | Fairfield | 41 08 24 N | 073 22 30 W |
| Nash Pond | Reservoir | 26 | Fairfield | 41 08 12 N | 073 22 16 W |
| Nash Pond | Reservoir | 246 | Litchfield | 41 50 18 N | 073 21 46 W |
| Nash Pond Dam | Dam | 26 | Fairfield | 41 08 12 N | 073 22 16 W |
| Nash Pond Dam | Dam | 246 | Litchfield | 41 50 18 N | 073 21 46 W |
| Nashawaug | Cape | 64 | Windham | 41 48 09 N | 071 53 14 W |
| Nasin Heliport | Airport | 70 | Windham | 41 43 31 N | 072 11 28 W |
| Nassahegan State Forest | Forest | 229 | Hartford | 41 45 17 N | 072 56 25 W |
| Nat Clocks Rock | Pillar | -3 | Fairfield | 41 02 00 N | 073 29 32 W |
| Natalie White Preserve | Park | 205 | Litchfield | 41 32 08 N | 073 16 24 W |
| Natchaug (historical) | Populated Place | 119 | Windham | 41 48 36 N | 072 06 51 W |
| Natchaug Hospital | Hospital | 73 | Windham | 41 47 10 N | 071 56 51 W |
| Natchaug Hospital | Hospital | 67 | Windham | 41 44 29 N | 072 11 51 W |
| Natchaug River | Stream | | Tolland | 41 42 46 N | 072 11 30 W |
| Natchaug School | School | 81 | Windham | 41 42 49 N | 072 12 25 W |
| Natchaug State Forest | Forest | 181 | Windham | 41 52 45 N | 072 11 16 W |
| Nathan Hale Birthplace | Locale | 184 | Tolland | 41 45 51 N | 072 20 44 W |
| Nathan Hale Cemetery | Cemetery | 168 | Tolland | 41 46 05 N | 072 18 27 W |
| Nathan Hale Elementary School | School | 56 | Hartford | 41 59 19 N | 072 30 49 W |
| Nathan Hale Middle School | School | 33 | Fairfield | 41 06 58 N | 073 23 38 W |
| Nathan Hale Park | Park | 8 | New Haven | 41 16 04 N | 072 53 59 W |
| Nathan Hale Place | Locale | 66 | Middlesex | 41 30 16 N | 072 26 50 W |
| Nathan Hale Plaza Shopping Center | Locale | 71 | Middlesex | 41 30 18 N | 072 26 47 W |
| Nathan Hale School | School | 7 | Fairfield | 41 10 18 N | 073 13 40 W |
| Nathan Hale School | School | 16 | Fairfield | 41 10 25 N | 073 12 47 W |
| Nathan Hale School | School | 73 | Hartford | 41 46 15 N | 072 30 59 W |
| Nathan Hale School | School | 17 | New Haven | 41 16 11 N | 072 53 50 W |
| Nathan Hale School | School | 77 | New Haven | 41 32 33 N | 072 46 24 W |
| Nathan Hale School (historical) | School | 8 | New London | 41 21 16 N | 072 05 43 W |
| Nathan Hale State Forest | Forest | 169 | Tolland | 41 46 00 N | 072 20 51 W |
| Nathan Hale Statue | Park | 22 | New London | 41 21 46 N | 072 06 36 W |
| Nathan Hale-Ray High School | School | 63 | Middlesex | 41 29 56 N | 072 27 00 W |
| Nathan Lester House | Building | 102 | New London | 41 25 24 N | 072 03 11 W |
| Nathan Pond | Lake | 87 | New Haven | 41 23 35 N | 072 38 26 W |
| Nathaniel Ely Elementary School | School | 22 | Fairfield | 41 04 55 N | 073 25 32 W |
| Nathaniel Hempstead House | Building | 25 | New London | 41 21 19 N | 072 06 15 W |
| Nathaniel Lyon Memorial Park | Park | 184 | Windham | 41 50 50 N | 072 04 55 W |
| Nathaniel Wheeler Memorial Fountain | Building | 8 | Fairfield | 41 10 26 N | 073 11 53 W |
| National Art Museum of Sport | Building | 34 | New Haven | 41 17 27 N | 072 57 41 W |
| National Spiritualist Church | Church | 20 | New London | 41 31 31 N | 072 04 33 W |
| National Theatre of the Deaf | Building | 15 | Middlesex | 41 24 09 N | 072 27 06 W |
| Nature Center for Environmental Activities Library | Building | 33 | Fairfield | 41 08 56 N | 073 23 09 W |
| Nature Conservatory | Building | 165 | Windham | 41 43 18 N | 072 04 07 W |
| Nature Park | Park | 28 | Hartford | 41 47 54 N | 072 35 30 W |
| Naubuc (historical) | Populated Place | 14 | Hartford | 41 43 21 N | 072 36 39 W |
| Naubuc School | School | 15 | Hartford | 41 43 20 N | 072 36 38 W |
| Naugatuck | Populated Place | 64 | New Haven | 41 29 09 N | 073 03 02 W |
| Naugatuck Avenue Shopping Center | Locale | 11 | New Haven | 41 11 40 N | 073 05 24 W |
| Naugatuck Congregational Church | Church | 71 | New Haven | 41 29 24 N | 073 03 20 W |
| Naugatuck Gardens | Populated Place | 22 | New Haven | 41 12 46 N | 073 05 43 W |
| Naugatuck High School | School | 92 | New Haven | 41 29 30 N | 073 04 20 W |
| Naugatuck Ice Company Pond | Reservoir | 84 | New Haven | 41 29 19 N | 073 04 09 W |
| Naugatuck Industrial Park | Locale | 157 | New Haven | 41 30 30 N | 073 02 18 W |
| Naugatuck Junction | Populated Place | 10 | New Haven | 41 12 27 N | 073 06 20 W |
| Naugatuck Post Office | Post Office | 69 | New Haven | 41 29 31 N | 073 03 17 W |
| Naugatuck River | Stream | | New Haven | 41 18 49 N | 073 04 50 W |
| Naugatuck River Reservoir | Reservoir | 9 | New Haven | 41 22 06 N | 073 05 04 W |
| Naugatuck River Reservoir | Reservoir | 68 | New Haven | 41 29 42 N | 073 02 58 W |
| Naugatuck River Reservoir | Reservoir | 51 | New Haven | 41 23 36 N | 073 04 40 W |