THE WASHINGTON COUNTY LAND BRIEF
Land in the
Long Island Sound Coastal Lowland setting.
Washington County has 329.3 square miles of land in Rhode Island. 4 mapped landscape regions meet across Washington County: Long Island Sound Coastal Lowland, Southern New England Coastal Plains and Hills, Narragansett/Bristol Lowland, among others.
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 ↗ · Regional mapping across the county footprint
Where the landscape changes
Washington County intersects 4 mapped regional units. The largest mapped shares are:
- Long Island Sound Coastal Lowland47.1%
- Southern New England Coastal Plains and Hills38.6%
- Narragansett/Bristol Lowland11.6%
- Cape Cod/Long Island2.8%
Atlantic Coastal Pine Barrens in Washington County
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.
Read the regional source ↗Finding your parcel within Washington County
The atlas lists 24 cities, towns, townships, and Census communities associated with Washington County, including Exeter, South Kingstown, North Kingstown. The list includes overlapping geography types and does not divide the county into exclusive service areas.
Washington County by land and water
The Census records 233.5 square miles of water within Washington County, or 41.5% of its total area. That share is close to Washington County’s 41.5%. This is geographic context; waterfront status and usable land must be checked at the parcel.
For scale, Washington County has 145.5 times the land area of nearby Charlestown CDP (2.26 square miles). These areas describe boundaries, not comparable property prices.
The Census boundary meets Kent County, Newport County within Rhode Island. A tract near one of these lines should be matched to the county identifier on its own records.

