THE POLK COUNTY LAND BRIEF
Land in the
Des Moines Lobe setting.
Polk County has 572.7 square miles of land in Iowa. 2 mapped landscape regions meet across Polk County: Des Moines Lobe, 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
Polk County intersects 2 mapped regional units. The largest mapped shares are:
- Des Moines Lobe75.2%
- Rolling Loess Prairies24.8%
Finding your parcel within Polk County
The atlas lists 21 cities, towns, townships, and Census communities associated with Polk County, including Des Moines, West Des Moines, Ankeny. The list includes overlapping geography types and does not divide the county into exclusive service areas.
Polk County by land and water
The Census records 19.2 square miles of water within Polk County, or 3.2% of its total area. That share is close to Polk County’s 3.2%. This is geographic context; waterfront status and usable land must be checked at the parcel.
For scale, Polk County has 84.4 times the land area of nearby Saylorville CDP (6.79 square miles). These areas describe boundaries, not comparable property prices.
The Census boundary meets Boone County, Dallas County, Jasper County, Madison County, Marion County, Story County, Warren County within Iowa. A tract near one of these lines should be matched to the county identifier on its own records.

