| Deering Reservoir | |
|---|---|
| Location | Hillsborough County, New Hampshire |
| Primary outflows | Piscataquog River |
| Basin countries | United States |
| Max. length | 1.5 mi (2.4 km) |
| Max. width | 0.8 mi (1.3 km) |
| Surface area | 315 acres (1.3 km2) |
| Surface elevation | 913 ft (278 m) |
| Settlements | Deering |
Deering Reservoir is a 315-acre (1.3 km2) water body located in Hillsborough County in southern New Hampshire, United States, in the town of Deering. The lake serves as the headwaters to the Piscataquog River, which flows east to the Merrimack River in Manchester.