| City : | Islip |
| County : | Suffolk County |
| State : | New York (NY) |
| Land Area : | 4.80 sq mi |
| Water Area : | 0.12 sq mi |
| Latitude : | 40.7354668 |
| Longitude : | -73.2163953 |
| Population (2010): | 18,689 |
| Population Estimate (2012) : | 18,862 |
| Population Density : | 3,893.51/sq mi |
| Housing Units (2012) : | 6,664 |
| Median Household Income (2012) : | $92,457 (New York : $57,683, USA : $53,046) |
| Median Family Income (2012) : | $102,253 (New York : $69,968, USA : $64,585) |
| Median House Price (2012) : | $372,000 (New York : $295,300, USA : $181,400) |