THE UNION COUNTY LAND BRIEF
Land in the
Green River-Southern Wabash Lowlands setting.
Union County has 342.9 square miles of land in Kentucky. 3 mapped landscape regions meet across Union County: Green River-Southern Wabash Lowlands, Wabash-Ohio Bottomlands, Caseyville Hills.
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
Union County intersects 3 mapped regional units. The largest mapped shares are:
- Green River-Southern Wabash Lowlands76.7%
- Wabash-Ohio Bottomlands21.1%
- Caseyville Hills2.2%
Finding your parcel within Union County
The atlas lists 5 cities, towns, townships, and Census communities associated with Union County, including Morganfield, Breckinridge Center, Sturgis. The list includes overlapping geography types and does not divide the county into exclusive service areas.
Union County by land and water
The Census records 20.3 square miles of water within Union County, or 5.6% of its total area. That share is close to Union County’s 5.6%. This is geographic context; waterfront status and usable land must be checked at the parcel.
For scale, Union County has 121.8 times the land area of nearby Morganfield city (2.81 square miles). These areas describe boundaries, not comparable property prices.
The Census boundary meets Crittenden County, Henderson County, Webster County within Kentucky. A tract near one of these lines should be matched to the county identifier on its own records.

