|Mississippi County, Arkansas|
Mississippi County Courthouse, Osceola
Location in the U.S. state of Arkansas
Arkansas's location in the U.S.
|Founded||November 1, 1833|
|Named for||Mississippi River|
|Seat||Blytheville and Osceola|
|• Total||920 sq mi (2,383 km2)|
|• Land||901 sq mi (2,334 km2)|
|• Water||19 sq mi (49 km2), 2.1%|
|• ( 2016)||42,835|
|• Density||52/sq mi (20/km2)|
|Time zone||Central: UTC−6/ −5|
Mississippi County is a county located in 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 formed on November 1, 1833, and named for the Mississippi River which borders the county to the east. Mississippi County is part of the First Congressional District in Arkansas. The Mississippi County Judge is Terri Brassfield.
The Blytheville, AR Micropolitan Statistical Area includes all of Mississippi County.
|U.S. Decennial Census
1790–1960  1900–1990 
1990–2000  2010–2016 
As of the 2010 census, there were 46,480 people residing in the county. The racial makeup of the county was 60.5% White, 33.9% Black, 0.3% Native American, 0.5% Asian, <0.0% Pacific Islander, 0.1% from some other race and 1.2% from two or more races. 3.6% were Hispanic or Latino of any race.
As of the 2000 census,  there were 51,979 people, 19,349 households, and 13,911 families residing in the county. The population density was 58 people per square mile (22/km²). There were 22,310 housing units at an average density of 25 per square mile (10/km²). The racial makeup of the county was 64.45% White, 32.70% Black or African American, 0.26% Native American, 0.38% Asian, 0.03% Pacific Islander, 1.07% from other races, and 1.12% from two or more races. 2.25% of the population were Hispanic or Latino of any race.
There were 19,349 households out of which 36.00% had children under the age of 18 living with them, 50.00% were married couples living together, 17.40% had a female householder with no husband present, and 28.10% were non-families. 24.70% of all households were made up of individuals and 10.70% had someone living alone who was 65 years of age or older. The average household size was 2.64 and the average family size was 3.15.
In the county, the population was spread out with 29.60% under the age of 18, 9.90% from 18 to 24, 27.50% from 25 to 44, 20.80% from 45 to 64, and 12.20% who were 65 years of age or older. The median age was 33 years. For every 100 females there were 91.80 males. For every 100 females age 18 and over, there were 87.70 males.
The median income for a household in the county was $27,479, and the median income for a family was $32,648. Males had a median income of $29,645 versus $19,782 for females. The per capita income for the county was $13,978. About 19.00% of families and 23.00% of the population were below the poverty line, including 31.10% of those under age 18 and 19.80% of those age 65 or over.
While a traditionally Democratic area, Mississippi County has voted Republican in the past three presidential elections.
Mississippi County is home to the following public school districts, listed in order of student population:
- Blytheville School District
- Osceola School District
- Gosnell School District
- Southern Mississippi County School District
- Manila School District
- Buffalo Island Central School District
- Armorel School District
The following school districts are based outside of the county but serve portions:
Mississippi County is served by the Mississippi–Crittenden Regional Library System, which includes the Mississippi County Library System (central library) and 13 branch libraries in communities throughout the county.
- FM 88.3 KBCM Blytheville
- FM 93.9 KAMJ Gosnell
- FM 96.3 KHLS Blytheville
- FM 103.7 KAIA K279BJ Blytheville
- FM 107.3 KQXF Osceola
- Blytheville Courier News, Newspaper, Blytheville, Arkansas
- Northeast Arkansas Town Crier, Newspaper, Manila, Arkansas
- The Osceola Times, Newspaper, Osceola, Arkansas
There are no television stations in Mississippi County, Arkansas. Mississippi County, Arkansas is placed in the Memphis, TN Television Market. Those stations include:
Townships in Arkansas are the divisions of a county. Each township includes unincorporated areas; some may have incorporated cities or towns within part of their boundaries. Arkansas townships have limited purposes in modern times. However, the United States Census does list Arkansas population based on townships (sometimes referred to as "county subdivisions" or "minor civil divisions"). Townships are also of value for historical purposes in terms of genealogical research. Each town or city is within one or more townships in an Arkansas county based on census maps and publications. The townships of Mississippi County are listed below; listed in parentheses are the cities, towns, and/or census-designated places that are fully or partially inside the township.  
- Big Lake ( Manila)
- Bowen ( Gosnell)
- Burdette ( Burdette)
- Carson ( Marie)
- Chickasawba ( Blytheville)
- Dyess ( Dyess)
- Fletcher ( Luxora, Victoria)
- Golden Lake ( Wilson)
- Half Moon Lake
- Hector ( Dell)
- Little River ( Etowah)
- McGavock ( Joiner)
- Monroe ( Keiser, Osceola)
- Neal ( Leachville)
- Scott ( Bassett)
- Whitton ( Birdsong)
- Island 35 Mastodon
- List of lakes in Mississippi County, Arkansas
- National Register of Historic Places listings in Mississippi County, Arkansas
- "State & County QuickFacts". United States Census Bureau. Archived from the original on July 14, 2011. Retrieved May 23, 2014.
- "Find a County". National Association of Counties. Retrieved 2011-06-07.
- "2010 Census Gazetteer Files". United States Census Bureau. August 22, 2012. Retrieved August 27, 2015.
- "Population and Housing Unit Estimates". Retrieved June 9, 2017.
- "U.S. Decennial Census". United States Census Bureau. Retrieved August 27, 2015.
- "Historical Census Browser". University of Virginia Library. Retrieved August 27, 2015.
- Forstall, Richard L., ed. (March 27, 1995). "Population of Counties by Decennial Census: 1900 to 1990". United States Census Bureau. Retrieved August 27, 2015.
- "Census 2000 PHC-T-4. Ranking Tables for Counties: 1990 and 2000" (PDF). United States Census Bureau. April 2, 2001. Retrieved August 27, 2015.
- Based on 2000 census data
- "American FactFinder". United States Census Bureau. Retrieved 2011-05-14.
- "Dave Leip's Atlas of U.S. Presidential Elections". Retrieved November 18, 2016.
- 2011 Boundary and Annexation Survey (BAS): Mississippi County, AR (PDF) (Map). U. S. Census Bureau. Archived from the original (PDF) on 2012-10-19. Retrieved 2011-08-19.
- "Arkansas: 2010 Census Block Maps - County Subdivision". United States Census Bureau. Retrieved May 29, 2014.
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