THE HARDIN COUNTY LAND BRIEF
Land in the
Clayey High Lime Till Plains setting.
Hardin County has 470.3 square miles of land in Ohio. The mapped landscape region in Hardin County is Clayey High Lime Till Plains.
Rolling glacial till plains are interrupted by end moraines and areas of older, more dissected deposits. The historical landscape had more tree cover than the Central Corn Belt to the west.
Regional context: Eastern Corn Belt Plains ↗ · Regional mapping across the county footprint
Finding your parcel within Hardin County
The atlas lists 25 cities, towns, townships, and Census communities associated with Hardin County, including McDonald, Pleasant, Dudley. The list includes overlapping geography types and does not divide the county into exclusive service areas.
Hardin County by land and water
The Census records 0.24 square miles of water within Hardin County, or 0.1% of its total area. That share is close to Hardin County’s 0.1%. This is geographic context; waterfront status and usable land must be checked at the parcel.
For scale, Hardin County has 18.8 times the land area of nearby Lynn township (25.1 square miles). These areas describe boundaries, not comparable property prices.
The Census boundary meets Allen County, Auglaize County, Hancock County, Logan County, Marion County, Union County, Wyandot County within Ohio. A tract near one of these lines should be matched to the county identifier on its own records.

