THE ISLIP LAND BRIEF
Land in the
Barrier Islands/Coastal Marshes setting.
Islip town has 103.2 square miles of land in Suffolk County. Its Census reference point is in Barrier Islands/Coastal Marshes, within Atlantic Coastal Pine Barrens.
Sandy coastal landscapes combine beaches, dunes, bays and marshes with oak-pine woodland. These pine-barrens settings form a transition between warmer southern coasts and rockier shores farther north.
Regional context: Atlantic Coastal Pine Barrens ↗ · Classification at the Census reference point
Islip and Suffolk County
Islip 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.
Islip by land and water
The Census records 59.6 square miles of water within Islip, or 36.6% of its total area. It is 25 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, Islip town has 26.1 times the land area of nearby East Islip CDP (3.95 square miles). These areas describe boundaries, not comparable property prices.

