THE ARMSTRONG COUNTY LAND BRIEF
Land in the
Pittsburgh Low Plateau setting.
Armstrong County has 653.3 square miles of land in Pennsylvania. The mapped landscape region in Armstrong County is Pittsburgh Low Plateau.
Rounded wooded hills and intervening valleys form an unglaciated plateau landscape. Valley floors contain much of the region's open land, contrasting with its more forested slopes.
Regional context: Western Allegheny Plateau ↗ · Regional mapping across the county footprint
Finding your parcel within Armstrong County
The atlas lists 58 cities, towns, townships, and Census communities associated with Armstrong County, including Cowanshannock, Wayne, Plumcreek. The list includes overlapping geography types and does not divide the county into exclusive service areas.
Armstrong County by land and water
The Census records 10.7 square miles of water within Armstrong County, or 1.6% of its total area. That share is close to Armstrong County’s 1.6%. This is geographic context; waterfront status and usable land must be checked at the parcel.
For scale, Armstrong County has 55.1 times the land area of nearby Rayburn township (11.8 square miles). These areas describe boundaries, not comparable property prices.
The Census boundary meets Butler County, Clarion County, Indiana County, Jefferson County, Westmoreland County within Pennsylvania. A tract near one of these lines should be matched to the county identifier on its own records.

