Sebastian County, Arkansas

county in Arkansas, United States

Sebastian County is a county of the U.S. state of Arkansas. As of the 2020 census, the population was 127,799,[1] making it the fourth-most populous county in Arkansas. The county has two county seats, Greenwood and Fort Smith.[2]

Sebastian County
The Sebastian County Courthouse in Ft. Smith
The Sebastian County Courthouse in Ft. Smith
Map of Arkansas highlighting Sebastian County
Location within the U.S. state of Arkansas
Map of the United States highlighting Arkansas
Arkansas's location within the U.S.
Coordinates: 35°35′39″N 94°15′29″W / 35.5942°N 94.2581°W / 35.5942; -94.2581
Country United States
State Arkansas
FoundedJanuary 6, 1851
Named forWilliam K. Sebastian
SeatFort Smith (northern district);
Greenwood (southern district)
Largest cityFort Smith
 • Total546 sq mi (1,410 km2)
 • Land532 sq mi (1,380 km2)
 • Water14 sq mi (40 km2)  2.6%
 • Total127,799
 • Density230/sq mi (90/km2)
Time zoneUTC−6 (Central)
 • Summer (DST)UTC−5 (CDT)


  1. 1.0 1.1 "QuickFacts: Sebastian County, Arkansas". United States Census Bureau. Retrieved August 8, 2023.
  2. "Find a County". National Association of Counties. Retrieved 2011-06-07.

Other websites


35°35′39″N 94°15′29″W / 35.59417°N 94.25806°W / 35.59417; -94.25806