Holtsville, New York
Holtsville, New York | |
|---|---|
The Holtsville Post Office in 2018. | |
U.S. Census map of Holtsville | |
| 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 | 0.00 sq mi (0.00 km2) |
| Elevation | 105 ft (32 m) |
| Population (2020) | |
• Total | 18,937 |
| • Density | 2,663.81/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 code(s) | 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. The population was 19,714 at the 2010 census.
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.