THE SUSSEX COUNTY LAND BRIEF
Land in the
Glaciated Reading Prong/Hudson Highlands setting.
Sussex County has 518.5 square miles of land in New Jersey. 5 mapped landscape regions meet across Sussex County: Glaciated Reading Prong/Hudson Highlands, Northern Glaciated Shale and Slate Valleys, Northern Glaciated Ridges, among others.
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.
Regional context: Northeastern Highlands ↗ · Regional mapping across the county footprint
Where the landscape changes
Sussex County intersects 5 mapped regional units. The largest mapped shares are:
- Glaciated Reading Prong/Hudson Highlands29.6%
- Northern Glaciated Shale and Slate Valleys21.5%
- Northern Glaciated Ridges21.5%
- Northern Glaciated Limestone Valleys18.6%
- Northern Glaciated Limestone Ridges, Valleys, and Terraces8.7%
Ridge and Valley in Sussex County
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.
Read the regional source ↗Finding your parcel within Sussex County
The atlas lists 33 cities, towns, townships, and Census communities associated with Sussex County, including Vernon, Wantage, Montague. The list includes overlapping geography types and does not divide the county into exclusive service areas.
Sussex County by land and water
The Census records 16.9 square miles of water within Sussex County, or 3.2% of its total area. That share is close to Sussex County’s 3.2%. This is geographic context; waterfront status and usable land must be checked at the parcel.
For scale, Sussex County has 291.5 times the land area of nearby Ross Corner CDP (1.78 square miles). These areas describe boundaries, not comparable property prices.
The Census boundary meets Morris County, Passaic County, Warren County within New Jersey. A tract near one of these lines should be matched to the county identifier on its own records.

