THE WASHINGTON COUNTY LAND BRIEF
Land in the
Northern Limestone/Dolomite Valleys setting.
Washington County has 457.8 square miles of land in Maryland. 6 mapped landscape regions meet across Washington County: Northern Limestone/Dolomite Valleys, Northern Shale Valleys, Northern Sedimentary and Metasedimentary Ridges, 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
Washington County intersects 6 mapped regional units. The largest mapped shares are:
- Northern Limestone/Dolomite Valleys56.3%
- Northern Shale Valleys19.7%
- Northern Sedimentary and Metasedimentary Ridges11%
- Northern Sandstone Ridges7.6%
- Northern Igneous Ridges4.4%
Blue Ridge in Washington County
Forested ridges, plateaus and high mountains extend through the Blue Ridge. Elevation, rainfall and sheltered coves create marked differences in forest communities across short distances.
Read the regional source ↗Finding your parcel within Washington County
The atlas lists 61 cities, towns, townships, and Census communities associated with Washington County, including Hagerstown, St. James, Wilson-Conococheague. 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 9.58 square miles of water within Washington County, or 2% of its total area. That share is close to Washington County’s 2%. This is geographic context; waterfront status and usable land must be checked at the parcel.
For scale, Washington County has 465.7 times the land area of nearby Williamsport town (0.98 square miles). These areas describe boundaries, not comparable property prices.
The Census boundary meets Allegany County, Frederick County within Maryland. A tract near one of these lines should be matched to the county identifier on its own records.

