THE JASPER COUNTY LAND BRIEF
Land in the
Rolling Loess Prairies setting.
Jasper County has 730.4 square miles of land in Iowa. 2 mapped landscape regions meet across Jasper County: Rolling Loess Prairies, Des Moines Lobe.
Glacial till plains and windblown loess hills make up the Western Corn Belt landscape. Near-level and rolling terrain are interspersed with steeper river valleys and hills.
Regional context: Western Corn Belt Plains ↗ · Regional mapping across the county footprint
Where the landscape changes
Jasper County intersects 2 mapped regional units. The largest mapped shares are:
- Rolling Loess Prairies93.2%
- Des Moines Lobe6.8%
Finding your parcel within Jasper County
The atlas lists 14 cities, towns, townships, and Census communities associated with Jasper County, including Newton, Mitchellville, Colfax. The list includes overlapping geography types and does not divide the county into exclusive service areas.
Jasper County by land and water
The Census records 2.52 square miles of water within Jasper County, or 0.3% of its total area. That share is close to Jasper County’s 0.3%. This is geographic context; waterfront status and usable land must be checked at the parcel.
For scale, Jasper County has 64.9 times the land area of nearby Newton city (11.3 square miles). These areas describe boundaries, not comparable property prices.
The Census boundary meets Mahaska County, Marion County, Marshall County, Polk County, Poweshiek County, Story County, Tama County within Iowa. A tract near one of these lines should be matched to the county identifier on its own records.

