THE HARRISON COUNTY LAND BRIEF
Land in the
Western Loess Hills setting.
Harrison County has 696.9 square miles of land in Iowa. 3 mapped landscape regions meet across Harrison County: Western Loess Hills, Missouri Alluvial Plain, Steeply Rolling Loess Prairies.
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
Harrison County intersects 3 mapped regional units. The largest mapped shares are:
- Western Loess Hills57.7%
- Missouri Alluvial Plain26.2%
- Steeply Rolling Loess Prairies16.1%
Finding your parcel within Harrison County
The atlas lists 12 cities, towns, townships, and Census communities associated with Harrison County, including Missouri Valley, Woodbine, Dunlap. The list includes overlapping geography types and does not divide the county into exclusive service areas.
Harrison County by land and water
The Census records 4.76 square miles of water within Harrison County, or 0.7% of its total area. That share is close to Harrison County’s 0.7%. This is geographic context; waterfront status and usable land must be checked at the parcel.
For scale, Harrison County has 1,142.4 times the land area of nearby Magnolia city (0.61 square miles). These areas describe boundaries, not comparable property prices.
The Census boundary meets Crawford County, Monona County, Pottawattamie County, Shelby County within Iowa. A tract near one of these lines should be matched to the county identifier on its own records.

