THE SEBASTIAN COUNTY LAND BRIEF
Land in the
Arkansas Valley Plains setting.
Sebastian County has 531.2 square miles of land in Arkansas. 3 mapped landscape regions meet across Sebastian County: Arkansas Valley Plains, Scattered High Ridges and Mountains, Arkansas River Floodplain.
The Arkansas Valley mixes forested ridges with broader valleys. Its terrain is less rugged than the Boston and Ouachita mountains that border it, but more varied than neighboring plains.
Regional context: Arkansas Valley ↗ · Regional mapping across the county footprint
Where the landscape changes
Sebastian County intersects 3 mapped regional units. The largest mapped shares are:
- Arkansas Valley Plains78.7%
- Scattered High Ridges and Mountains16.8%
- Arkansas River Floodplain4.5%
Finding your parcel within Sebastian County
The atlas lists 11 cities, towns, townships, and Census communities associated with Sebastian County, including Fort Smith, Greenwood, Barling. The list includes overlapping geography types and does not divide the county into exclusive service areas.
Sebastian County by land and water
The Census records 13.3 square miles of water within Sebastian County, or 2.4% of its total area. That share is close to Sebastian County’s 2.4%. This is geographic context; waterfront status and usable land must be checked at the parcel.
For scale, Sebastian County has 46.4 times the land area of nearby Greenwood city (11.5 square miles). These areas describe boundaries, not comparable property prices.
The Census boundary meets Crawford County, Franklin County, Logan County, Scott County within Arkansas. A tract near one of these lines should be matched to the county identifier on its own records.

