Feature Name | Class | Elev. meters | County | Latitude DMS | Longitude DMS |
| Connecticut State Library | Building | 28 | Hartford | 41 45 45 N | 072 40 59 W |
| Connecticut State Library for the Blind and Physically Handicapped | Building | 51 | Hartford | 41 39 10 N | 072 38 50 W |
| Connecticut State Medical Society | Building | 32 | New Haven | 41 19 13 N | 072 55 14 W |
| Connecticut State Office Building | Building | 34 | Hartford | 41 45 43 N | 072 40 51 W |
| Connecticut State Orphanage | Building | 91 | Windham | 41 47 29 N | 071 57 41 W |
| Connecticut State Records Center | Building | 51 | Hartford | 41 39 10 N | 072 38 50 W |
| Connecticut State Superior Courthouse | Building | 25 | New London | 41 31 30 N | 072 04 41 W |
| Connecticut State Veterans Home and Hospital | Hospital | 72 | Hartford | 41 39 19 N | 072 39 09 W |
| Connecticut Superior Court | Building | 4 | Middlesex | 41 33 40 N | 072 38 50 W |
| Connecticut Superior Court Building | Building | 22 | New Haven | 41 18 34 N | 072 55 17 W |
| Connecticut Superior Court Juvenile Court and Detention Center | Building | 21 | New Haven | 41 19 03 N | 072 56 23 W |
| Connecticut Superior Courthouse | Building | 28 | New London | 41 31 34 N | 072 04 34 W |
| Connecticut Trolley Museum | Building | 18 | New Haven | 41 16 35 N | 072 51 11 W |
| Connecticut Trolley Museum | Locale | 43 | Hartford | 41 55 50 N | 072 35 51 W |
| Connecticut Trolley Museum Library | Building | 43 | Hartford | 41 55 50 N | 072 35 51 W |
| Connecticut Valley Church of Christ | Church | 42 | Hartford | 41 50 56 N | 072 39 44 W |
| Connecticut Valley Hindu Temple | Church | 83 | Middlesex | 41 32 23 N | 072 36 53 W |
| Connecticut Valley Hospital | Hospital | 32 | Middlesex | 41 33 25 N | 072 37 55 W |
| Connecticut Yankee Atomic Power Information and Science Center | Building | 20 | Middlesex | 41 28 56 N | 072 29 55 W |
| Conservatin Center | Building | 282 | Litchfield | 41 43 24 N | 073 12 43 W |
| Constitution Plaza | Park | 34 | Hartford | 41 45 44 N | 072 40 50 W |
| Constitution Square | Park | 7 | New Haven | 41 18 08 N | 072 55 20 W |
| Consumer Products Division/Warner-Lambert Company Heliport | Airport | 5 | New Haven | 41 13 48 N | 073 02 14 W |
| Conte High School | School | 98 | New Haven | 41 27 26 N | 072 51 28 W |
| Contentment Island | Island | 7 | Fairfield | 41 03 18 N | 073 27 24 W |
| Continental Army Hospital State Monument | Park | 124 | Hartford | 41 47 27 N | 072 46 39 W |
| Convent Mary Immaculate | Building | 26 | Hartford | 41 45 22 N | 072 42 58 W |
| Convent Notre Dame School (historical) | School | 84 | New Haven | 41 33 22 N | 073 02 49 W |
| Convent of the Sacred Heart | Church | 142 | Fairfield | 41 03 59 N | 073 41 40 W |
| Converse Art Gallery | Building | 36 | New London | 41 32 13 N | 072 04 54 W |