| Nehantic State Forest | |
| Map: | USA Connecticut#USA |
| Map Size: | 280 |
| Relief: | 1 |
| Location: | New London, Connecticut, United States |
| Coordinates: | 41.4192°N -72.2608°W |
| Area Acre: | 5062 |
| Elevation: | 285feet |
| Governing Body: | Connecticut Department of Energy and Environmental Protection |
| Website: | Nehantic State Forest |
Nehantic State Forest is a publicly owned forest and recreation area occupying two parcels, one in the town of Lyme and one in the towns of East Lyme and Salem, in the state of Connecticut. The forest, which totals, is the site of regular prescribed burns and timber-harvesting operations. Purchase of the land began in 1926, when it became the first state forest located in New London County. It is managed by the Connecticut Department of Energy and Environmental Protection.
The forest offers opportunities for hiking, hunting, picnicking, swimming and boating. The Lyme portion of the forest provides access to the 69acres Uncas Pond and the 30acres Norwich Pond. Boat launches are located on each pond. The ponds and their connecting stream, Falls Brook, sit at the western edge of Becket Hill State Park Reserve. No roads or trails pass from the state forest into the undeveloped and otherwise inaccessible 260acres state park reserve though dirt park roads and the Blue-Blazed Nayantaquit Trail hiking trail system make much of the Lyme section (Western Block) of Nehantic State Forest easily accessible to the public.