| New Mill Pond | |
| Location: | Suffolk County, New York |
| Coordinates: | 40.8414°N -73.2256°W |
| Type: | artificial lake |
| Pushpin Map: | New York |
| Pushpin Map Alt: | Location of the lake in New York. |
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 109acres. It is owned by Suffolk County Parks Department.
New Mill Pond Dam is of earthen construction. Its height is 15feet with a length of 465feet. Its capacity is . Normal storage is . It drains an area of 23.02sqmi.