Feature Name | Class | Elev. meters | County | Latitude DMS | Longitude DMS |
| 1983 Downtown Stamford Historic District | Park | 7 | Fairfield | 41 03 13 N | 073 32 22 W |
| 467 Main Street Shopping Center | Locale | 14 | Hartford | 41 45 15 N | 072 38 36 W |
| 50 Washington Street Heliport | Airport | 1 | Fairfield | 41 06 00 N | 073 25 11 W |
| A Baldwin Middle School | School | 56 | New Haven | 41 20 15 N | 072 43 10 W |
| A J Oster Company Heliport | Airport | 95 | Litchfield | 41 36 51 N | 073 03 31 W |
| A W Cox School | School | 15 | New Haven | 41 17 16 N | 072 41 42 W |
| Aaron Fien Square | Park | 27 | Hartford | 41 47 05 N | 072 41 46 W |
| Abbey Brook | Stream | | Tolland | 41 58 50 N | 072 28 29 W |
| Abbey of Regina Laudis Library | Building | 222 | Litchfield | 41 36 45 N | 073 12 37 W |
| Abbott Dam | Dam | 159 | Windham | 41 53 12 N | 072 00 10 W |
| Abbott Pond | Reservoir | 159 | Windham | 41 53 12 N | 072 00 10 W |
| Abbott Tech School | School | 124 | Fairfield | 41 24 47 N | 073 27 14 W |
| Abbotts Pond | Lake | 155 | New Haven | 41 32 37 N | 073 06 39 W |
| Abe Stone Park | Park | 85 | New Haven | 41 21 53 N | 073 04 50 W |
| Abe Stone Park | Park | 47 | New Haven | 41 21 36 N | 073 04 42 W |
| Abigail Point | Cape | 0 | New London | 41 20 16 N | 071 58 25 W |
| Abington | Populated Place | 166 | Windham | 41 51 38 N | 072 00 24 W |
| Abington Brook | Stream | | Windham | 41 52 09 N | 071 59 45 W |
| Abington Congregational Church | Church | 169 | Windham | 41 51 28 N | 072 00 30 W |
| Abington Social Library | Building | 169 | Windham | 41 51 28 N | 072 00 30 W |
| Aborn Brook | Stream | | Tolland | 41 55 56 N | 072 22 07 W |
| Above All | Summit | 450 | Litchfield | 41 43 37 N | 073 21 10 W |
| Above All State Park | Park | 448 | Litchfield | 41 43 36 N | 073 21 10 W |
| Abraham Nichols Park | Park | 88 | Fairfield | 41 14 38 N | 073 09 38 W |
| Abraham Pierson School | School | 4 | Middlesex | 41 16 42 N | 072 31 15 W |
| Abundant Life Community Church | Church | 90 | Windham | 41 42 35 N | 072 13 37 W |
| Abundant Life United Church | Church | 125 | Windham | 42 00 40 N | 071 53 32 W |
| Academy Hill | Summit | 6 | Fairfield | 41 10 19 N | 073 07 37 W |
| Academy Hill | Summit | 81 | Hartford | 41 46 35 N | 072 31 17 W |
| Academy Hill Square Shopping Center | Locale | 8 | Fairfield | 41 11 35 N | 073 07 52 W |
| Academy of Information Technology and Engineering | School | | Fairfield | 41 05 04 N | 073 32 54 W |
| Academy of Our Lady of Mercy | School | 21 | New Haven | 41 13 30 N | 073 03 44 W |
| Academy of the Holy Family | School | 45 | New London | 41 36 56 N | 072 05 17 W |
| Academy on the Green | School | 13 | New Haven | 41 16 51 N | 072 48 53 W |
| Academy Plaza | Building | 33 | New London | 41 22 25 N | 072 05 59 W |
| Academy School | School | 15 | Hartford | 41 42 25 N | 072 36 31 W |
| Academy School | School | 8 | New Haven | 41 16 47 N | 072 36 02 W |
| Acadia House | Building | 16 | New Haven | 41 17 08 N | 072 40 44 W |
| Achenbach | Populated Place | 55 | Middlesex | 41 35 14 N | 072 42 25 W |
| Acme Mall Shopping Center | Locale | 23 | New Haven | 41 20 56 N | 072 55 53 W |
| Acme Pond | Lake | 174 | Windham | 41 50 46 N | 071 49 00 W |
| Acme Pond | Reservoir | 101 | Windham | 41 56 42 N | 071 53 40 W |
| Acme Pond Dam | Dam | 174 | Windham | 41 50 46 N | 071 49 00 W |
| Acme Pond Dam | Dam | 100 | Windham | 41 56 42 N | 071 53 40 W |
| Acquidaneck (historical) | Populated Place | 102 | Windham | 41 47 15 N | 071 52 05 W |
| Acropolis (historical) | Populated Place | 88 | Litchfield | 41 32 11 N | 073 12 20 W |
| Act 2 Theater | Building | 22 | New Haven | 41 19 55 N | 072 55 28 W |
| Acton Public Library | Building | 9 | Middlesex | 41 17 16 N | 072 22 46 W |
| Adams Brook | Stream | | Litchfield | 41 53 21 N | 073 21 26 W |
| Adams Brook | Stream | | New London | 41 37 46 N | 072 03 29 W |
| Adams Cemetery | Cemetery | 13 | Fairfield | 41 02 44 N | 073 34 18 W |
| Adams Fall | Bar | -3 | New Haven | 41 14 37 N | 072 54 38 W |
| Adams Schoolhouse (historical) | School | 124 | Fairfield | 41 14 59 N | 073 18 06 W |
| Adder Reservoir | Reservoir | 151 | Middlesex | 41 33 11 N | 072 43 43 W |
| Adder Reservoir Dam | Dam | 151 | Middlesex | 41 33 18 N | 072 43 40 W |
| Addessi Center Shopping Center | Locale | 228 | Fairfield | 41 16 48 N | 073 29 53 W |
| Addis Park | Park | 64 | Litchfield | 41 33 15 N | 073 24 21 W |
| Addison | Populated Place | 36 | Hartford | 41 43 06 N | 072 34 36 W |
| Addison Pond | Reservoir | 32 | Hartford | 41 43 09 N | 072 34 32 W |
| Addison Pond Dam | Dam | 33 | Hartford | 41 43 09 N | 072 34 34 W |
| Adds Brook | Stream | | Hartford | 41 55 31 N | 072 37 40 W |
| Advent Christian Camp | Locale | 67 | Hartford | 41 38 23 N | 072 52 03 W |
| Advent Christian Church | Church | 202 | Fairfield | 41 25 02 N | 073 28 24 W |
| Advent Christian Church | Church | 35 | Fairfield | 41 12 48 N | 073 08 43 W |
| Advent Christian Church | Church | 111 | Hartford | 41 40 52 N | 072 56 57 W |
| Advent Christian Church | Church | 37 | New Haven | 41 27 21 N | 072 49 09 W |
| African Methodist Resurrection Episcopal Zion Church | Church | 64 | Hartford | 41 40 24 N | 072 47 11 W |
| Agape Christian Center | Church | 13 | New Haven | 41 18 23 N | 072 56 03 W |
| Agudath Sholom Cemetery | Cemetery | 35 | Fairfield | 41 05 04 N | 073 33 58 W |
| Aiken School | School | 39 | Hartford | 41 47 32 N | 072 44 28 W |
| Airport Center Shopping Center | Locale | 53 | Hartford | 41 55 30 N | 072 40 10 W |
| Airways Golf Course | Locale | 49 | Hartford | 41 57 41 N | 072 42 08 W |
| Al-Marzook Athletic Fields | Park | 29 | Hartford | 41 48 09 N | 072 43 01 W |
| Albany Avenue Branch Hartford Public Library | Building | 24 | Hartford | 41 46 58 N | 072 41 51 W |
| Albert D Griswold Middle School | School | 42 | Hartford | 41 40 03 N | 072 38 56 W |
| Albertson Memorial Church | Church | 3 | Fairfield | 41 01 44 N | 073 34 02 W |
| Albertus Magnus College | School | 38 | New Haven | 41 19 54 N | 072 55 20 W |
| Albertus Magnus College Library | Building | 32 | New Haven | 41 19 53 N | 072 55 23 W |
| Alcott Middle School | School | 293 | New Haven | 41 37 28 N | 072 57 34 W |
| Alden Brook | Stream | | Tolland | 41 59 26 N | 072 17 03 W |
| Alder Swamp | Swamp | 74 | Litchfield | 41 33 41 N | 073 12 25 W |
| Alderbrook Cemetery | Cemetery | 9 | New Haven | 41 17 09 N | 072 39 59 W |
| Aldo Park | Park | 114 | Fairfield | 41 14 29 N | 073 14 14 W |
| Aldon Mill Pond | Reservoir | 101 | Tolland | 41 49 12 N | 072 28 58 W |
| Aldon Mill Pond Dam | Dam | 102 | Tolland | 41 49 12 N | 072 28 58 W |
| Aldorizo Park | Park | 191 | Litchfield | 41 35 55 N | 073 05 14 W |
| Aldrich Contemporary Art Museum | Building | 234 | Fairfield | 41 16 35 N | 073 29 50 W |
| Aldrich Free Public Library | Building | 80 | Windham | 41 43 09 N | 071 52 30 W |
| Aldrich Park | Park | 173 | Fairfield | 41 18 10 N | 073 28 28 W |
| Aldrich Pond | Lake | 145 | Windham | 41 54 28 N | 071 51 31 W |
| Alewife Cove | Bay | 2 | New London | 41 18 56 N | 072 06 08 W |
| Alexander Lake | Lake | 77 | Windham | 41 51 37 N | 071 54 08 W |
| Alexander Pond | Lake | 89 | Middlesex | 41 29 44 N | 072 19 39 W |
| Alfred C Fuller Music Center | Building | 18 | Hartford | 41 47 52 N | 072 42 51 W |
| Algonquin Club | Locale | 13 | Fairfield | 41 10 34 N | 073 11 31 W |
| Algonquin School | School | 258 | New Haven | 41 29 54 N | 072 58 30 W |
| Algonquin State Forest | Forest | 211 | Litchfield | 41 59 26 N | 073 03 20 W |
| Alice Peck School | School | 85 | New Haven | 41 25 17 N | 072 55 15 W |
| All Hallows Church | Church | 83 | Windham | 41 42 48 N | 071 53 10 W |
| All Hallows Convent | School | 85 | Windham | 41 42 48 N | 071 53 08 W |
| All Saints Cemetery | Cemetery | 34 | New Haven | 41 22 09 N | 072 49 56 W |
| All Saints Cemetery | Cemetery | 123 | New Haven | 41 31 23 N | 073 01 37 W |
| All Saints Episcopal Church | Church | 128 | Litchfield | 41 35 14 N | 073 05 01 W |
| All Saints Episcopal Church | Church | 22 | Middlesex | 41 20 47 N | 072 26 16 W |
| All Saints Episcopal Church | Church | 260 | New Haven | 41 35 59 N | 072 58 31 W |
| All Saints Orthodox Church | Church | 32 | Hartford | 41 47 01 N | 072 42 36 W |
| All Saints Parish Church | Church | 45 | New Haven | 41 32 22 N | 072 48 35 W |
| All Saints School | School | 70 | Fairfield | 41 08 15 N | 073 25 01 W |
| Allegra Farm | Locale | 93 | Middlesex | 41 27 21 N | 072 26 08 W |
| Allen Brook | Stream | | New Haven | 41 25 34 N | 072 50 51 W |