Holtsville, New York
Holtsville, New York | |
|---|---|
The Holtsville Post Office in 2018. | |
U.S. Census map of Holtsville | |
Holtsville, New York Location within the state of New York Holtsville, New York Holtsville, New York (New York) | |
| Coordinates: 40°48′48″N 73°2′50″W / 40.81333°N 73.04722°W | |
| Country | United States |
| State | New York |
| County | Suffolk |
| Towns | Brookhaven Islip |
| Area | |
• Total | 7.11 sq mi (18.41 km2) |
| • Land | 7.11 sq mi (18.41 km2) |
| • Water | 0 sq mi (0.00 km2) |
| Elevation | 105 ft (32 m) |
| Population (2020) | |
• Total | 18,937 |
| • Density | 2,663.9/sq mi (1,028.53/km2) |
| Time zone | UTC−05:00 (Eastern Time Zone) |
| • Summer (DST) | UTC−04:00 |
| ZIP Codes | 00501, 00544, 11742 |
| Area codes | 631, 934 |
| FIPS code | 36-35254 |
| GNIS feature ID | 0953030 |
Holtsville is a hamlet and census-designated place (CDP) in Suffolk County, on Long Island, in New York, United States. As of the 2020 census, Holtsville had a population of 18,937.
The hamlet is mainly in the Town of Brookhaven, while the southwestern portion is in the Town of Islip. An IRS Processing Center is located in Holtsville, along with NYPA's Richard M. Flynn Power Plant.