Mississippi County, Arkansas

Mississippi County
Mississippi County Courthouse, Osceola
Location within the U.S. state of Arkansas
Arkansas's location within the U.S.
Coordinates: 35°46′36″N 90°03′16″W / 35.776666666667°N 90.054444444444°W / 35.776666666667; -90.054444444444
Country United States
State Arkansas
FoundedNovember 1, 1833
Named afterMississippi River
SeatBlytheville and Osceola
Largest cityBlytheville
Government
  JudgeJohn Nelson
Area
  Total
920 sq mi (2,400 km2)
  Land901 sq mi (2,330 km2)
  Water19 sq mi (50 km2)  2.1%
Population
 (2020)
  Total
40,685
  Estimate 
(2023)
38,663
  Density44/sq mi (17/km2)
Time zoneUTC−6 (Central)
  Summer (DST)UTC−5 (CDT)
Congressional district1st
Websitewww.mississippicountyar.org

Mississippi County is the easternmost county in the U.S. state of Arkansas. As of the 2020 census, the population was 40,685. There are two county seats, Blytheville and Osceola. The county is named for the Mississippi River which borders the county to the east. Mississippi County is part of the First Congressional District in Arkansas.

The Blytheville, AR Micropolitan Statistical Area includes all of Mississippi County.