|Hempstead County, Arkansas|
Hempstead County Courthouse in Hope
Location in the U.S. state of Arkansas
Arkansas's location in the U.S.
|Founded||December 15, 1818|
|Named for||Edward Hempstead|
|• Total||741 sq mi (1,919 km2)|
|• Land||728 sq mi (1,886 km2)|
|• Water||14 sq mi (36 km2), 1.8%|
|• ( 2016)||21,974|
|• Density||31/sq mi (12/km2)|
|Time zone||Central: UTC−6/ −5|
Hempstead County is a county located in the U.S. state of Arkansas. As of the 2010 census, the population was 22,609.  The county seat is Hope.  Hempstead County is Arkansas's fourth county, formed on December 15, 1818, alongside Clark and Pulaski counties. The county is named for Edward Hempstead, a delegate to the U.S. Congress from the Missouri Territory, which included present-day Arkansas at the time.  It is an alcohol prohibition or dry county.
Historic Washington State Park is located in Hempstead County some nine miles northwest of Hope in the historic village of Washington, Arkansas. The state park opened in 1973 as "Old Washington Historic State Park", but the "Old" was dropped from the name in 2006. The park offers walking tours of the historic village, which contains more than a dozen historic structures from the 19th and early 20th centuries.
According to the U.S. Census Bureau, the county has a total area of 741 square miles (1,920 km2), of which 728 square miles (1,890 km2) is land and 14 square miles (36 km2) (1.8%) is water.  Hempstead County is alternately considered as part of the greater regions of South Arkansas or Southwest Arkansas.
- Pike County (north)
- Nevada County (east)
- Lafayette County (south)
- Miller County (southwest)
- Little River County (west)
- Howard County (northwest)
|U.S. Decennial Census
1790–1960  1900–1990 
1990–2000  2010–2016 
As of the 2000 census,  there were 23,587 people, 8,959 households, and 6,378 families residing in the county. The population density was 32 people per square mile (12/km²). There were 10,166 housing units at an average density of 14 per square mile (5/km²). The racial makeup of the county was 63.28% White, 30.36% Black or African American, 0.42% Native American, 0.17% Asian, 0.02% Pacific Islander, 4.17% from other races, and 1.59% from two or more races. 8.25% of the population were Hispanic or Latino of any race.
There were 8,959 households out of which 33.40% had children under the age of 18 living with them, 51.40% were married couples living together, 15.30% had a female householder with no husband present, and 28.80% were non-families. 25.50% of all households were made up of individuals and 11.70% had someone living alone who was 65 years of age or older. The average household size was 2.60 and the average family size was 3.09.
In the county, the population was spread out with 27.30% under the age of 18, 9.60% from 18 to 24, 27.20% from 25 to 44, 21.70% from 45 to 64, and 14.10% who were 65 years of age or older. The median age was 35 years. For every 100 females, there were 93.70 males. For every 100 females age 18 and over, there were 89.70 males.
The median income for a household in the county was $28,622, and the median income for a family was $34,082. Males had a median income of $25,830 versus $17,383 for females. The per capita income for the county was $14,103. About 16.00% of families and 20.30% of the population were below the poverty line, including 29.20% of those under age 18 and 16.70% of those age 65 or over.
Although historically Democratic, Hempstead County has trended Republican in the last three elections.
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 Hempstead County are listed below; listed in parentheses are the cities, towns, and/or census-designated places that are fully or partially inside the township.  
- List of lakes in Hempstead County, Arkansas
- National Register of Historic Places listings in Hempstead County, Arkansas
- "State & County QuickFacts". United States Census Bureau. Archived from the original on July 11, 2011. Retrieved May 21, 2014.
- "Find a County". National Association of Counties. Archived from the original on 2011-05-31. Retrieved 2011-06-07.
- Gannett, Henry (1905). The Origin of Certain Place Names in the United States. Govt. Print. Off. p. 154.
- "2010 Census Gazetteer Files". United States Census Bureau. August 22, 2012. Retrieved August 26, 2015.
- "Population and Housing Unit Estimates". Retrieved June 9, 2017.
- "U.S. Decennial Census". United States Census Bureau. Archived from the original on May 12, 2015. Retrieved August 26, 2015.
- "Historical Census Browser". University of Virginia Library. Retrieved August 26, 2015.
- Forstall, Richard L., ed. (March 27, 1995). "Population of Counties by Decennial Census: 1900 to 1990". United States Census Bureau. Retrieved August 26, 2015.
- "Census 2000 PHC-T-4. Ranking Tables for Counties: 1990 and 2000" (PDF). United States Census Bureau. April 2, 2001. Retrieved August 26, 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): Hempstead County, AR (PDF) (Map). U. S. Census Bureau. Archived from the original (PDF) on 2012-10-19. Retrieved 2011-08-24.
- "Arkansas: 2010 Census Block Maps - County Subdivision". United States Census Bureau. Retrieved May 28, 2014.