THE DELAWARE COUNTY LAND BRIEF
Land in the
Eastern Iowa and Minnesota Drift Plains setting.
Delaware County has 577.7 square miles of land in Iowa. 3 mapped landscape regions meet across Delaware County: Eastern Iowa and Minnesota Drift Plains, Blufflands and Coulees, 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
Delaware County intersects 3 mapped regional units. The largest mapped shares are:
- Eastern Iowa and Minnesota Drift Plains91.8%
- Blufflands and Coulees8.1%
- Rolling Loess Prairies0.2%
Driftless Area in Delaware County
Deeply cut valleys divide a bedrock plateau with windblown soil on many uplands. Glaciers had less influence here than in neighboring regions, leaving a distinctly hilly landscape.
Read the regional source ↗Finding your parcel within Delaware County
The atlas lists 12 cities, towns, townships, and Census communities associated with Delaware County, including Dyersville, Manchester, Edgewood. The list includes overlapping geography types and does not divide the county into exclusive service areas.
Delaware County by land and water
The Census records 1.23 square miles of water within Delaware County, or 0.2% of its total area. That share is close to Delaware County’s 0.2%. This is geographic context; waterfront status and usable land must be checked at the parcel.
For scale, Delaware County has 791.3 times the land area of nearby Delaware city (0.73 square miles). These areas describe boundaries, not comparable property prices.
The Census boundary meets Buchanan County, Clayton County, Dubuque County, Fayette County, Jones County, Linn County within Iowa. A tract near one of these lines should be matched to the county identifier on its own records.

