THE BLAIR COUNTY LAND BRIEF
Land in the
Northern Sandstone Ridges setting.
Blair County has 525.1 square miles of land in Pennsylvania. 6 mapped landscape regions meet across Blair County: Northern Sandstone Ridges, Northern Limestone/Dolomite Valleys, Northern Dissected Ridges and Knobs, 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
Blair County intersects 6 mapped regional units. The largest mapped shares are:
- Northern Sandstone Ridges34.3%
- Northern Limestone/Dolomite Valleys31.6%
- Northern Dissected Ridges and Knobs19.6%
- Forested Hills and Mountains9.8%
- Northern Shale Valleys4.2%
Central Appalachians in Blair County
A rugged, deeply cut plateau of sandstone, shale and related rocks supports extensive forest. High hills and low mountains distinguish this Appalachian landscape from smoother neighboring regions.
Read the regional source ↗Finding your parcel within Blair County
The atlas lists 109 cities, towns, townships, and Census communities associated with Blair County, including Antis, Frankstown, Logan. The list includes overlapping geography types and does not divide the county into exclusive service areas.
Blair County by land and water
The Census records 1.27 square miles of water within Blair County, or 0.2% of its total area. That share is close to Blair County’s 0.2%. This is geographic context; waterfront status and usable land must be checked at the parcel.
For scale, Blair County has 834.8 times the land area of nearby Elberta CDP (0.63 square miles). These areas describe boundaries, not comparable property prices.
The Census boundary meets Bedford County, Cambria County, Centre County, Clearfield County, Huntingdon County within Pennsylvania. A tract near one of these lines should be matched to the county identifier on its own records.

