THE JOHNSON COUNTY LAND BRIEF
Land in the
Loamy High Lime Till Plains setting.
Johnson County has 320.4 square miles of land in Indiana. 2 mapped landscape regions meet across Johnson County: Loamy High Lime Till Plains, Knobs-Norman Upland.
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
Where the landscape changes
Johnson County intersects 2 mapped regional units. The largest mapped shares are:
- Loamy High Lime Till Plains94.1%
- Knobs-Norman Upland5.9%
Interior Plateau in Johnson County
Open hills, irregular plains and tablelands are developed on limestone and other sedimentary rocks. Oak-hickory woodland, local prairie and cedar-glade settings contribute to this diverse inland plateau.
Read the regional source ↗Finding your parcel within Johnson County
The atlas lists 20 cities, towns, townships, and Census communities associated with Johnson County, including White River, Hensley, Nineveh. The list includes overlapping geography types and does not divide the county into exclusive service areas.
Johnson County by land and water
The Census records 1.38 square miles of water within Johnson County, or 0.4% of its total area. That share is close to Johnson County’s 0.4%. This is geographic context; waterfront status and usable land must be checked at the parcel.
For scale, Johnson County has 9 times the land area of nearby Franklin township (35.5 square miles). These areas describe boundaries, not comparable property prices.
The Census boundary meets Bartholomew County, Brown County, Marion County, Morgan County, Shelby County within Indiana. A tract near one of these lines should be matched to the county identifier on its own records.

