There are 8 former lookout sites registered in Connecticut. The most recently registered former lookout site is Dennis Hill Tower Site (US 69, CT 8), added on September 9, 2008.
| Lookout Name | NHLR Registry Number | Available for Rental | Visit Reports |
| Bald Hill Tower Site | US 68, CT 7 | ||
| Beckwith Hill Tower Site | US 67, CT 6 | ||
| Dennis Hill Tower Site | US 69, CT 8 | ||
| Fort Hill Tower Site | US 66, CT 5 | ||
| Governors Hill Tower Site | US 65, CT 4 | ||
| Johnny Cake Mountain Tower Site | US 64, CT 3 | ||
| Mount Parnassus Tower Site | US 63, CT 2 | ||
| Turkey Hill Observation Tower Site | US 62, CT 1 |