Sebastian County, Arkansas
|Sebastian County, Arkansas|
Location in the state of Arkansas
Arkansas's location in the U.S.
|Founded||January 6, 1851|
|Seat||Fort Smith (northern district);
Greenwood (southern district)
|Largest City||Fort Smith|
546 sq mi (1,414 km²)
532 sq mi (1,378 km²)
14 sq mi (36 km²), 2.6%
236/sq mi (91/km²)
|Time zone||Central: UTC-6/-5|
|Named for: William K. Sebastian|
Sebastian County is a county of the U.S. state of Arkansas. As of the 2010 census, the population was 125,744, making it the fourth-most populous county in Arkansas. The county has two county seats, Greenwood and Fort Smith.