Sebastian County on the map of Arkansas 2024. Cities, roads, borders and directions in Sebastian County of Arkansas.

Sebastian County is found on the western edge of Arkansas. This amazing county is named after William K. Sebastian (1812-1865), a U.S. Senator. The population of Sebastian County exceeds 128 thousand people. The county, organized on January 6, 1851, spans an area of 546 square miles. The county seats of Sebastian County are Fort Smith and Greenwood. This map shows the borders of Sebastian County as well as neighboring counties, including major highways and natural objecsts as of 2024. Zoom in or out of the map using the plus/minus panel. Move the center of this map by dragging it. Also check out the satellite map of Sebastian County.