Feature Name | Class | Elev. meters | County | Latitude DMS | Longitude DMS |
| Wildmans Landing | Populated Place | 134 | Fairfield | 41 25 29 N | 073 27 18 W |
| Wilford Pond | Lake | 163 | Litchfield | 41 47 59 N | 073 23 22 W |
| WILI-AM (Willimantic) | Tower | 49 | Windham | 41 42 54 N | 072 11 21 W |
| WILI-FM (Willimantic) | Tower | 204 | New London | 41 41 00 N | 072 12 57 W |
| Wilkinson Building | Building | 19 | New Haven | 41 19 57 N | 072 57 09 W |
| Will Cone Pond | Reservoir | 134 | Middlesex | 41 28 38 N | 072 21 41 W |
| Willard Bay | Bay | -3 | Middlesex | 41 15 47 N | 072 22 43 W |
| Willard Hall | Building | 48 | Hartford | 41 41 22 N | 072 46 10 W |
| Willard Island | Island | 3 | New Haven | 41 15 20 N | 072 32 40 W |
| William A Buckingham School | School | 35 | New London | 41 31 50 N | 072 04 53 W |
| William A Downes Archives | Building | 20 | New London | 41 21 15 N | 071 58 23 W |
| William D Bertini Park | Park | 60 | New Haven | 41 24 41 N | 072 48 18 W |
| William E Finch Junior Archives | Building | 6 | Fairfield | 41 02 15 N | 073 35 44 W |
| William H Hall High School | School | 54 | Hartford | 41 47 35 N | 072 45 18 W |
| William J Johnston School | School | 151 | New London | 41 34 27 N | 072 19 21 W |
| William J Ulbrich Reservoir | Reservoir | 104 | New Haven | 41 27 28 N | 072 44 33 W |
| William Pitt Child Developement Center | Building | | Fairfield | 41 03 48 N | 073 31 38 W |
| William Putnam Memorial Bridge | Bridge | -26 | Middlesex | 41 42 52 N | 072 38 25 W |
| William Ross Public Library | Building | 127 | Windham | 41 47 41 N | 072 07 42 W |
| William School | School | 65 | New London | 41 22 57 N | 072 06 30 W |
| William Seeley School | School | 50 | New London | 41 21 58 N | 072 04 21 W |
| William W Backus Hospital Medical Nursing Library | Building | 30 | New London | 41 32 33 N | 072 05 21 W |
| William Wolfe Park | Park | 102 | Fairfield | 41 18 34 N | 073 14 45 W |
| Williamantic Town Hall | Building | 81 | Windham | 41 42 48 N | 072 13 05 W |
| Williams Beach Park | Park | -3 | New London | 41 20 45 N | 071 57 38 W |
| Williams Brook | Stream | | New London | 41 25 12 N | 071 57 12 W |
| Williams Crossing | Populated Place | 74 | New London | 41 39 24 N | 072 09 30 W |
| Williams Hill | Summit | 91 | Hartford | 41 53 30 N | 072 47 58 W |
| Williams Memorial Institute | School | 31 | New London | 41 21 27 N | 072 06 13 W |
| Williams Memorial Park | Park | 28 | New London | 41 21 23 N | 072 06 06 W |
| Williams Memorial Park Historic District | Park | 30 | New London | 41 21 23 N | 072 06 04 W |
| Williams Park | Park | 135 | Fairfield | 41 28 14 N | 073 23 12 W |
| Williams Park | Park | 32 | New London | 41 21 32 N | 072 06 14 W |
| Williams Pond | Lake | 83 | Hartford | 41 42 07 N | 072 33 24 W |
| Williams Pond | Lake | 22 | Hartford | 41 42 18 N | 072 35 42 W |
| Williams Pond | Reservoir | 135 | New London | 41 37 47 N | 072 18 02 W |
| Williams Pond Dam | Dam | 21 | Hartford | 41 42 18 N | 072 35 42 W |
| Williams Pond Dam | Dam | 135 | New London | 41 37 47 N | 072 18 02 W |
| Williams School | School | 58 | New Haven | 41 23 25 N | 072 47 43 W |
| Williamsville Fire Department | Building | 81 | Windham | 41 50 23 N | 071 54 17 W |
| Willimantic | Populated Place | 67 | Windham | 41 42 38 N | 072 12 29 W |
| Willimantic Camp Ground | Locale | 117 | Windham | 41 41 59 N | 072 11 32 W |
| Willimantic Community Memorial Hospital | Hospital | 104 | Windham | 41 43 03 N | 072 13 35 W |
| Willimantic Country Club | Locale | 84 | Windham | 41 43 35 N | 072 11 05 W |
| Willimantic Footbridge | Bridge | 76 | Windham | 41 42 37 N | 072 12 49 W |
| Willimantic Plaza Shopping Center | Locale | 91 | Windham | 41 43 23 N | 072 14 13 W |
| Willimantic Post Office | Post Office | 84 | Windham | 41 42 48 N | 072 13 02 W |
| Willimantic Public Library | Building | 81 | Windham | 41 42 47 N | 072 13 00 W |
| Willimantic Reservoir | Reservoir | 55 | Windham | 41 44 25 N | 072 11 37 W |
| Willimantic Reservoir Dam | Dam | 55 | Windham | 41 44 25 N | 072 11 37 W |
| Willimantic River | Stream | | Windham | 41 37 47 N | 072 18 03 W |
| Willington Hill | Populated Place | 241 | Tolland | 41 52 30 N | 072 15 50 W |
| Willis Pond | Lake | 304 | Tolland | 42 00 05 N | 072 11 51 W |
| Willis School | School | 42 | New Haven | 41 20 28 N | 073 05 09 W |
| Willisville (historical) | Populated Place | 26 | Fairfield | 41 03 16 N | 073 30 34 W |
| Willoughby Wallace Memorial Library | Building | 6 | New Haven | 41 16 07 N | 072 45 07 W |
| Willow Brook | Stream | | Hartford | 41 45 06 N | 072 38 52 W |
| Willow Brook | Stream | | Hartford | 41 38 12 N | 072 44 42 W |
| Willow Brook | Stream | | New Haven | 41 32 47 N | 072 46 15 W |
| Willow Brook | Stream | | New Haven | 41 26 44 N | 072 54 17 W |
| Willow Brook Park | Park | 18 | Hartford | 41 38 56 N | 072 46 33 W |
| Willow Park | Park | 30 | New London | 41 21 37 N | 072 07 13 W |
| Willow Point | Cape | 211 | Litchfield | 41 41 57 N | 073 20 57 W |
| Willow Point | Cape | 0 | New London | 41 20 38 N | 071 58 24 W |
| Willowbrook Cemetery | Cemetery | 15 | Fairfield | 41 09 17 N | 073 21 43 W |
| Willowbrook Early Childhood Center | School | 19 | Middlesex | 41 44 40 N | 072 38 14 W |
| Willowbrook Farms | Locale | 62 | New Haven | 41 30 47 N | 072 55 55 W |
| Willys Meadow Brook | Stream | | New London | 41 22 45 N | 072 11 16 W |
| Wilmot Brook | Stream | | New Haven | 41 20 30 N | 072 57 21 W |
| Wilshire Pond | Reservoir | 127 | Fairfield | 41 06 58 N | 073 39 38 W |
| Wilshire Pond Brook | Stream | | Fairfield | 41 06 10 N | 073 39 13 W |
| Wilshire Pond Dam | Dam | 127 | Fairfield | 41 06 58 N | 073 39 38 W |
| Wilson | Populated Place | 16 | Hartford | 41 48 43 N | 072 39 26 W |
| Wilson Branch Windsor Public Library | Building | 18 | Hartford | 41 48 46 N | 072 39 30 W |
| Wilson Brook | Stream | | Hartford | 41 47 39 N | 072 28 45 W |
| Wilson Congregational Church | Church | 19 | Hartford | 41 48 48 N | 072 39 26 W |
| Wilson Cove | Bay | 7 | Fairfield | 41 03 57 N | 073 25 53 W |
| Wilson Head | Island | 0 | Fairfield | 41 00 01 N | 073 38 25 W |
| Wilson High School | School | 41 | Hartford | 41 49 23 N | 072 40 27 W |
| Wilson Hill | Summit | 81 | New London | 41 21 30 N | 072 13 23 W |
| Wilson Playground | Park | 82 | Hartford | 41 40 27 N | 072 55 11 W |
| Wilson Point | Cape | 5 | Fairfield | 41 03 49 N | 073 25 42 W |
| Wilson Pond | Reservoir | 252 | Litchfield | 41 44 42 N | 073 02 05 W |
| Wilson Pond Dam | Dam | 252 | Litchfield | 41 44 42 N | 073 02 05 W |
| Wilsonville | Populated Place | 118 | Windham | 42 00 44 N | 071 53 24 W |
| Wilsonville Cemetery | Cemetery | 145 | Windham | 42 01 41 N | 071 53 00 W |
| Wilsonville Heliport | Airport | 145 | Windham | 42 00 50 N | 071 52 44 W |
| Wilton | Populated Place | 77 | Fairfield | 41 11 43 N | 073 26 16 W |
| Wilton Baptist Church | Church | 60 | Fairfield | 41 11 30 N | 073 25 39 W |
| Wilton Congregational Church | Church | 59 | Fairfield | 41 11 46 N | 073 25 51 W |
| Wilton Heritage Museum | Building | 55 | Fairfield | 41 11 24 N | 073 25 37 W |
| Wilton High School | School | 73 | Fairfield | 41 12 16 N | 073 25 58 W |
| Wilton Historical Society Building | Building | 56 | Fairfield | 41 11 25 N | 073 25 38 W |
| Wilton Historical Society Library | Building | 56 | Fairfield | 41 11 25 N | 073 25 38 W |
| Wilton Library Association | Building | 53 | Fairfield | 41 11 33 N | 073 25 50 W |
| Wilton Pond | Reservoir | 154 | Litchfield | 41 38 42 N | 073 03 40 W |
| Wilton Pond Dam | Dam | 154 | Litchfield | 41 38 42 N | 073 03 40 W |
| Wilton Riding Club | Locale | 108 | Fairfield | 41 12 36 N | 073 27 03 W |
| Wilton Station | Locale | 59 | Fairfield | 41 11 46 N | 073 25 51 W |
| Wimisink Brook | Stream | | Fairfield | 41 38 50 N | 073 29 04 W |
| Winaker Cemetery | Cemetery | 169 | New London | 41 28 57 N | 072 13 17 W |
| Winchester Building | Building | 36 | New Haven | 41 17 28 N | 072 57 41 W |
| Winchester Building | Building | 22 | New Haven | 41 18 13 N | 072 56 04 W |
| Winchester Cemetery | Cemetery | 395 | Litchfield | 41 53 30 N | 073 07 36 W |
| Winchester Center | Populated Place | 404 | Litchfield | 41 54 00 N | 073 08 05 W |
| Winchester Club Pond | Reservoir | 401 | Litchfield | 41 55 00 N | 073 07 34 W |
| Winchester Club Pond Dam | Dam | 401 | Litchfield | 41 55 00 N | 073 07 34 W |
| Winchester Lake | Reservoir | 390 | Litchfield | 41 54 24 N | 073 08 34 W |
| Winchester Lake Dam | Dam | 390 | Litchfield | 41 54 24 N | 073 08 34 W |
| Winchester Mall Shopping Center | Locale | 46 | Hartford | 41 47 59 N | 072 33 46 W |