| City : | Holtsville |
| County : | Parker County, Suffolk County |
| State : | New York (NY) |
| | |
| Land Area : | 7.11 sq mi |
| Water Area : | 0.00 sq mi |
| Latitude : | 40.8123343 |
| Longitude : | -73.0446765 |
| | |
| Population (2010): | 19,714 |
| Population Estimate (2012) : | 19,689 |
| Population Density : | 2,771.53/sq mi |
| Housing Units (2012) : | 6,929 |
| Median Household Income (2012) : | $86,648 (New York : $57,683, USA : $53,046) |
| Median Family Income (2012) : | $101,847 (New York : $69,968, USA : $64,585) |
| Median House Price (2012) : | $356,900 (New York : $295,300, USA : $181,400) |