New Mill Pond is a lake in Smithtown on the Northeast Branch River in Suffolk County, New York and is used for recreational purposes. Construction was completed in 1825. It has a normal surface area of 109 acres (0.44 km2). It is owned by Suffolk County Parks Department.
| New Mill Pond | |
|---|---|
  New Mill Pond | |
| Location | Suffolk County, New York |
| Coordinates | 40°50′29″N 73°13′32″W / 40.84139°N 73.22556°W |
| Type | artificial lake |
New Mill Pond Dam is of earthen construction. Its height is 15 feet (4.6 m) with a length of 465 feet (142 m). Its capacity is 545 acre-feet (672,000 m3). Normal storage is 308 acre-feet (380,000 m3). It drains an area of 23.02 square miles (59.6 km2).