THE ORANGE COUNTY LAND BRIEF
Land in the
Northern Glaciated Shale and Slate Valleys setting.
Orange County has 812.1 square miles of land in New York. 7 mapped landscape regions meet across Orange County: Northern Glaciated Shale and Slate Valleys, Glaciated Reading Prong/Hudson Highlands, Northern Glaciated Limestone Valleys, among others.
Long, roughly parallel ridges and valleys follow folded and faulted rock layers. Limestone valleys, sandstone ridges and other geologic contrasts produce varied terrain and numerous regional springs and caves.
Regional context: Ridge and Valley ↗ · Regional mapping across the county footprint
Where the landscape changes
Orange County intersects 7 mapped regional units. The largest mapped shares are:
- Northern Glaciated Shale and Slate Valleys49.9%
- Glaciated Reading Prong/Hudson Highlands25.9%
- Northern Glaciated Limestone Valleys8.6%
- Low Poconos6.1%
- Hudson Valley5.6%
Northeastern Highlands in Orange 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 ↗North Central Appalachians in Orange County
Forest-covered plateau surfaces, high hills and low mountains are underlain by layered sedimentary rocks. Most of this region escaped continental glaciation, leaving deeply cut upland terrain.
Read the regional source ↗Finding your parcel within Orange County
The atlas lists 61 cities, towns, townships, and Census communities associated with Orange County, including Warwick, Deerpark, Wallkill. The list includes overlapping geography types and does not divide the county into exclusive service areas.
Orange County by land and water
The Census records 26.2 square miles of water within Orange County, or 3.1% of its total area. That share is close to Orange County’s 3.1%. This is geographic context; waterfront status and usable land must be checked at the parcel.
For scale, Orange County has 244.6 times the land area of nearby Goshen village (3.32 square miles). These areas describe boundaries, not comparable property prices.
The Census boundary meets Dutchess County, Putnam County, Rockland County, Sullivan County, Ulster County within New York. A tract near one of these lines should be matched to the county identifier on its own records.

