THE GALLIA COUNTY LAND BRIEF
Land in the
Monongahela Transition Zone setting.
Gallia County has 466.5 square miles of land in Ohio. 2 mapped landscape regions meet across Gallia County: Monongahela Transition Zone, Ohio/Kentucky Carboniferous 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
Gallia County intersects 2 mapped regional units. The largest mapped shares are:
- Monongahela Transition Zone73.6%
- Ohio/Kentucky Carboniferous Plateau26.4%
Finding your parcel within Gallia County
The atlas lists 23 cities, towns, townships, and Census communities associated with Gallia County, including Walnut, Perry, Green. The list includes overlapping geography types and does not divide the county into exclusive service areas.
Gallia County by land and water
The Census records 4.67 square miles of water within Gallia County, or 1% of its total area. That share is close to Gallia County’s 1%. This is geographic context; waterfront status and usable land must be checked at the parcel.
For scale, Gallia County has 12.3 times the land area of nearby Green township (37.9 square miles). These areas describe boundaries, not comparable property prices.
The Census boundary meets Jackson County, Lawrence County, Meigs County, Vinton County within Ohio. A tract near one of these lines should be matched to the county identifier on its own records.

