| Zip Code : | 11780 |
| City : | Head of the Harbor village, Nesconset, Nissequogue village, St. James, Smithtown, Stony Brook |
| County : | Suffolk County |
| State : | New York (NY) |
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| Land Area : | 11.51 sq mi |
| Water Area : | 3.96 sq mi |
| Latitude : | 40.9092871 |
| Longitude : | -73.1747293 |
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| Population (2010): | 15,524 |
| Population Estimate (2012) : | 14,733 |
| Population Density : | 1,348.80/sq mi |
| Housing Units (2012) : | 5,586 |
| Median Household Income (2012) : | $108,073 (New York : $57,683, USA : $53,046) |
| Median Family Income (2012) : | $130,052 (New York : $69,968, USA : $64,585) |
| Median House Price (2012) : | $520,100 (New York : $295,300, USA : $181,400) |