Major highways

• Future Interstate 69
• U.S. Highway 79
• U.S. Highway 278
• Highway 4
• Highway 7
• Highway 9
• Highway 24

Adjacent counties

• Dallas County (north)
• Calhoun County (east)
• Union County (south)
• Columbia County (southwest)
• Nevada County (west)
• Clark County (northwest)

2020 census

As of the 2020 United States census, there were 22,650 people, 9,658 households, and 6,009 families residing in the county.

2010 census

As of the 2010 census, there were 26,120 people living in the county. The racial makeup of the county was 56.3% White, 39.9% Black, 0.3% Native American, 0.4% Asian, <0.1% Pacific Islander, 0.1% from some other race and 1.4% from two or more races. 1.6% were Hispanic or Latino of any race.

2000 census

As of the 2000 census,^[12] there were 28,790 people, 11,613 households, and 8,071 families living in the county. The population density was 39 inhabitants per square mile (15/km²). There were 13,450 housing units at an average density of 18 per square mile (6.9/km²). The racial makeup of the county was 59.74% White, 38.64% Black or African American, 0.25% Native American, 0.24% Asian, 0.03% Pacific Islander, 0.26% from other races, and 0.83% from two or more races. 0.73% of the population were Hispanic or Latino of any race.

There were 11,613 households, out of which 30.80% had children under the age of 18 living with them, 50.00% were married couples living together, 15.60% had a female householder with no husband present, and 30.50% were non-families. 28.00% of all households were made up of individuals, and 13.50% had someone living alone who was 65 years of age or older. The average household size was 2.45 and the average family size was 2.99.

In the county, the population was spread out, with 25.90% under the age of 18, 8.00% from 18 to 24, 25.60% from 25 to 44, 23.60% from 45 to 64, and 16.90% who were 65 years of age or older. The median age was 39 years. For every 100 females, there were 89.80 males. For every 100 females age 18 and over, there were 85.00 males.

The median income for a household in the county was $29,341, and the median income for a family was $35,736. Males had a median income of $30,976 versus $18,800 for females. The per capita income for the county was $15,118. About 16.10% of families and 19.50% of the population were below the poverty line, including 26.20% of those under age 18 and 18.60% of those age 65 or over.

Cities

• Bearden
• Camden (county seat)
• Chidester
• East Camden
• Stephens

Town

• Louann

Census designated place

• Reader

Unincorporated community

• Cullendale

Townships

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 Ouachita County are listed below; listed in parentheses are the cities, towns, and/or census-designated places that are fully or partially inside the township. ^[14][15]