THE CLARION COUNTY LAND BRIEF
Land in the
Pittsburgh Low Plateau setting.
Clarion County has 600.8 square miles of land in Pennsylvania. 2 mapped landscape regions meet across Clarion County: Pittsburgh Low Plateau, Unglaciated High Allegheny 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
Where the landscape changes
Clarion County intersects 2 mapped regional units. The largest mapped shares are:
- Pittsburgh Low Plateau84%
- Unglaciated High Allegheny Plateau16%
North Central Appalachians in Clarion 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 Clarion County
The atlas lists 40 cities, towns, townships, and Census communities associated with Clarion County, including Farmington, Porter, Limestone. The list includes overlapping geography types and does not divide the county into exclusive service areas.
Clarion County by land and water
The Census records 9.01 square miles of water within Clarion County, or 1.5% of its total area. That share is close to Clarion County’s 1.5%. This is geographic context; waterfront status and usable land must be checked at the parcel.
For scale, Clarion County has 381.7 times the land area of nearby Clarion borough (1.57 square miles). These areas describe boundaries, not comparable property prices.
The Census boundary meets Armstrong County, Butler County, Forest County, Jefferson County, Venango County within Pennsylvania. A tract near one of these lines should be matched to the county identifier on its own records.

