THE NANTUCKET COUNTY LAND BRIEF
Land in the
Cape Cod/Long Island setting.
Nantucket County has 46.2 square miles of land in Massachusetts. The mapped landscape region in Nantucket County is Cape Cod/Long Island.
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 ↗ · Regional mapping across the county footprint
Finding your parcel within Nantucket County
The atlas lists 4 cities, towns, townships, and Census communities associated with Nantucket County, including Nantucket, Nantucket, Siasconset. The list includes overlapping geography types and does not divide the county into exclusive service areas.
Nantucket County by land and water
The Census records 257.5 square miles of water within Nantucket County, or 84.8% of its total area. That share is close to Nantucket County’s 84.8%. This is geographic context; waterfront status and usable land must be checked at the parcel.
For scale, Nantucket County has 7.9 times the land area of nearby Nantucket CDP (5.82 square miles). These areas describe boundaries, not comparable property prices.
The Census boundary meets Dukes County within Massachusetts. A tract near one of these lines should be matched to the county identifier on its own records.

