THE MARION COUNTY LAND BRIEF
Land in the
Clayey High Lime Till Plains setting.
Marion County has 403.8 square miles of land in Ohio. The mapped landscape region in Marion 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 Marion County
The atlas lists 23 cities, towns, townships, and Census communities associated with Marion County, including Claridon, Marion, Big Island. The list includes overlapping geography types and does not divide the county into exclusive service areas.
Marion County by land and water
The Census records 0.35 square miles of water within Marion County, or 0.1% of its total area. That share is close to Marion County’s 0.1%. This is geographic context; waterfront status and usable land must be checked at the parcel.
For scale, Marion County has 11 times the land area of nearby Marion township (36.7 square miles). These areas describe boundaries, not comparable property prices.
The Census boundary meets Crawford County, Delaware County, Hardin County, Morrow 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.

