THE IOWA COUNTY LAND BRIEF
Land in the
Rolling Loess Prairies setting.
Iowa County has 586.5 square miles of land in Iowa. 2 mapped landscape regions meet across Iowa County: Rolling Loess Prairies, Eastern Iowa and Minnesota Drift Plains.
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
Iowa County intersects 2 mapped regional units. The largest mapped shares are:
- Rolling Loess Prairies99.4%
- Eastern Iowa and Minnesota Drift Plains0.6%
Finding your parcel within Iowa County
The atlas lists 15 cities, towns, townships, and Census communities associated with Iowa County, including Williamsburg, Marengo, South Amana. The list includes overlapping geography types and does not divide the county into exclusive service areas.
Iowa County by land and water
The Census records 1.04 square miles of water within Iowa County, or 0.2% of its total area. That share is close to Iowa County’s 0.2%. This is geographic context; waterfront status and usable land must be checked at the parcel.
For scale, Iowa County has 174 times the land area of nearby Williamsburg city (3.37 square miles). These areas describe boundaries, not comparable property prices.
The Census boundary meets Benton County, Johnson County, Keokuk County, Linn County, Poweshiek County, Tama County, Washington County within Iowa. A tract near one of these lines should be matched to the county identifier on its own records.

