THE SMITHTOWN LAND BRIEF
Land in the
Long Island Sound Coastal Lowland setting.
Smithtown town has 53.8 square miles of land in Suffolk County. Its Census reference point is in Long Island Sound Coastal Lowland, within Northeastern Coastal Zone.
Irregular plains and low hills form a coastal transition with glacial lakes and oak-pine woodland. This northeastern landscape is gentler than the mountainous country farther inland.
Regional context: Northeastern Coastal Zone ↗ · Classification at the Census reference point
Smithtown and Suffolk County
Smithtown is associated with Suffolk County in the Census boundary data. Start with the parcel’s tax bill to match the property to that jurisdiction, then confirm which government handles its land use.
Smithtown by land and water
The Census records 57.7 square miles of water within Smithtown, or 51.8% of its total area. It is 9.8 percentage points lower than the 61.6% recorded for Suffolk County. This is geographic context; waterfront status and usable land must be checked at the parcel.
For scale, Smithtown town has 14.1 times the land area of nearby Nissequogue village (3.81 square miles). These areas describe boundaries, not comparable property prices.

