THE BUCHANAN COUNTY LAND BRIEF
Land in the
Rolling Loess Prairies setting.
Buchanan County has 408.2 square miles of land in Missouri. 3 mapped landscape regions meet across Buchanan County: Rolling Loess Prairies, Missouri Alluvial Plain, Loess Flats and Till 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
Buchanan County intersects 3 mapped regional units. The largest mapped shares are:
- Rolling Loess Prairies82.2%
- Missouri Alluvial Plain15.8%
- Loess Flats and Till Plains1.9%
Central Irregular Plains in Buchanan County
Irregular plains form a transition between northern agricultural country and more wooded uplands to the south and east. Grassland and forest historically mixed, with wider woodland belts beside streams.
Read the regional source ↗Finding your parcel within Buchanan County
The atlas lists 9 cities, towns, townships, and Census communities associated with Buchanan County, including St. Joseph, Agency, Gower. The list includes overlapping geography types and does not divide the county into exclusive service areas.
Buchanan County by land and water
The Census records 6.93 square miles of water within Buchanan County, or 1.7% of its total area. That share is close to Buchanan County’s 1.7%. This is geographic context; waterfront status and usable land must be checked at the parcel.
For scale, Buchanan County has 110.8 times the land area of nearby Agency village (3.69 square miles). These areas describe boundaries, not comparable property prices.
The Census boundary meets Andrew County, Clinton County, DeKalb County, Platte County within Missouri. A tract near one of these lines should be matched to the county identifier on its own records.

