THE ROCKLAND COUNTY LAND BRIEF
Land in the
Glaciated Triassic Lowlands setting.
Rockland County has 173.7 square miles of land in New York. 4 mapped landscape regions meet across Rockland County: Glaciated Triassic Lowlands, Glaciated Reading Prong/Hudson Highlands, Trap Rock and Conglomerate Uplands, among others.
Rounded low hills, open valleys and irregular plains form a transition between Appalachian highlands and the coastal plain. The underlying geology mixes metamorphic, igneous and sedimentary rocks.
Regional context: Northern Piedmont ↗ · Regional mapping across the county footprint
Where the landscape changes
Rockland County intersects 4 mapped regional units. The largest mapped shares are:
- Glaciated Triassic Lowlands59%
- Glaciated Reading Prong/Hudson Highlands30.3%
- Trap Rock and Conglomerate Uplands10.5%
- Southern New England Coastal Plains and Hills0.2%
Northeastern Highlands in Rockland County
Forested hills and mountains span northern New England, the Adirondacks and higher Catskills. Glacial lakes and steep streams accompany a transition between northern hardwood and spruce-fir forests.
Read the regional source ↗Northeastern Coastal Zone in Rockland County
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.
Read the regional source ↗Finding your parcel within Rockland County
The atlas lists 40 cities, towns, townships, and Census communities associated with Rockland County, including Ramapo, Clarkstown, Stony Point. The list includes overlapping geography types and does not divide the county into exclusive service areas.
Rockland County by land and water
The Census records 25.8 square miles of water within Rockland County, or 12.9% of its total area. That share is close to Rockland County’s 12.9%. This is geographic context; waterfront status and usable land must be checked at the parcel.
For scale, Rockland County has 473.3 times the land area of nearby New Square village (0.37 square miles). These areas describe boundaries, not comparable property prices.
The Census boundary meets Orange County, Putnam County, Westchester County within New York. A tract near one of these lines should be matched to the county identifier on its own records.

