| Official Name: | New Hackensack, New York |
| Settlement Type: | Census-designated place |
| Pushpin Map: | New York#USA |
| Pushpin Label: | New Hackensack |
| Coordinates: | 41.6214°N -73.8689°W |
| Subdivision Type: | Country |
| Subdivision Name: | United States |
| Subdivision Type1: | State |
| Subdivision Name1: | New York |
| Subdivision Type2: | County |
| Subdivision Name2: | Dutchess |
| Subdivision Type3: | Town |
| Subdivision Name3: | Wappinger |
| Area Footnotes: | [1] |
| Area Total Sq Mi: | 2.08 |
| Area Land Sq Mi: | 2.08 |
| Area Water Sq Mi: | 0.00 |
| Area Total Km2: | 5.38 |
| Area Land Km2: | 5.37 |
| Area Water Km2: | 0.01 |
| Population As Of: | 2020 |
| Population Density Km2: | 278.55 |
| Timezone: | Eastern (EST) |
| Utc Offset: | -5 |
| Timezone Dst: | EDT |
| Utc Offset Dst: | -4 |
| Elevation Ft: | 192 |
| Postal Code Type: | ZIP Code |
| Postal Code: | 12590 (Wappingers Falls) |
| Area Code: | 845 |
| Blank Name: | FIPS code |
| Blank Info: | 36-50265 |
| Blank1 Name: | GNIS feature ID |
| Blank1 Info: | 2812764 |
| Population Total: | 1497 |
| Unit Pref: | Imperial |
| Population Density Sq Mi: | 721.45 |
New Hackensack is an unincorporated community and census-designated place (CDP) in the town of Wappinger in Dutchess County, New York, United States. It was first listed as a CDP prior to the 2020 census.
New Hackensack is in western Dutchess County, in the northeastern section of Wappinger. It is bordered to the southwest by the Myers Corner CDP and to the west by the Hudson Valley Regional Airport, formerly known as Dutchess County Airport and originally known as "New Hackensack Field" in the 1930s and 1940s. New York State Route 376 passes through the community, leading north 7miles to Poughkeepsie and southeast 5miles to Hopewell Junction. Wappingers Falls is 3miles to the southwest.