Mississippi County, Arkansas
Mississippi County Courthouse, Osceola
Location within the U.S. state of Arkansas
Arkansas's location within the U.S.
|Founded||November 1, 1833|
|Named for||Mississippi River|
|Seat||Blytheville and Osceola|
|• Total||920 sq mi (2,400 km2)|
|• Land||901 sq mi (2,330 km2)|
|• Water||19 sq mi (50 km2) 2.1%%|
| • Estimate |
|• Density||52/sq mi (20/km2)|
|Time zone||UTC−6 (Central)|
|• Summer (DST)||UTC−5 (CDT)|
Mississippi County is a county of the U.S. state of Arkansas. As of the 2010 census, the population was 46,480. There are two county seats, Blytheville and Osceola. The county was founded on November 1, 1833, and named for the Mississippi River which borders the county to the east.