THE WARREN COUNTY LAND BRIEF
Land in the
River Hills setting.
Warren County has 428.6 square miles of land in Missouri. 2 mapped landscape regions meet across Warren County: River Hills, Claypan Prairie.
Broad terraced river valleys contrast with wooded slopes and dissected glacial plains. Bottomland settings and upland oak landscapes occur close together across the Interior River Valleys and Hills.
Regional context: Interior River Valleys and Hills ↗ · Regional mapping across the county footprint
Where the landscape changes
Warren County intersects 2 mapped regional units. The largest mapped shares are:
- River Hills78.3%
- Claypan Prairie21.7%
Central Irregular Plains in Warren 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 Warren County
The atlas lists 8 cities, towns, townships, and Census communities associated with Warren County, including Innsbrook, Warrenton, Foristell. The list includes overlapping geography types and does not divide the county into exclusive service areas.
Warren County by land and water
The Census records 9.12 square miles of water within Warren County, or 2.1% of its total area. That share is close to Warren County’s 2.1%. This is geographic context; waterfront status and usable land must be checked at the parcel.
For scale, Warren County has 334.6 times the land area of nearby Truesdale city (1.28 square miles). These areas describe boundaries, not comparable property prices.
The Census boundary meets Franklin County, Gasconade County, Lincoln County, Montgomery County, St. Charles County within Missouri. A tract near one of these lines should be matched to the county identifier on its own records.

