2010 census
At the 2010 census, 19,875 people, 7,527 households, and 5,393 families were living in the county. [12] [10] The population density was 43.9 inhabitants per square mile (16.9/km2). The 9,289 housing units had an average density of 20.5 per square mile (7.9/km2). [13] The racial makeup of the county was 61.1% White, 26.3% Black or African American, 0.4% American Indian, 0.3% Pacific Islander, 0.2% Asian, 10.3% from other races, and 1.4% from two or more races. Those of Hispanic or Latino origin made up 14.4% of the population. [12] In terms of ancestry, 17.8% were American, 14.7% were German, 8.6% were English, and 8.2% were Irish. [14]
Of the 7,527 households, 32.5% had children under 18 living with them, 50.6% were married couples living together, 15.0% had a female householder with no husband present, 28.4% were not families, and 24.2% of all households were made up of individuals. The average household size was 2.61 and the average family size was 3.05. The median age was 39.6 years. [12]
The median income for a household in the county was $40,508 and for a family was $45,173. Males had a median income of $31,264 versus $28,344 for females. The per capita income for the county was $18,717. About 11.7% of families and 15.1% of the population were below the poverty line, including 19.4% of those under 18 and 15.0% of those 65 or over. [15]
2000 census
At the 2000 census, [16] 19,181 people, 7,127 households, and 5,295 families lived in the county. The population density was 42 people per square mile (16 people/km2). The 8,543 housing units had an average density of 19 per square mile (7.3/km2). The racial makeup of the county was 65.80% White, 29.99% Black or African American, 0.23% Native American, 0.04% Asian, 3.30% from other races, and 0.64% from two or more races. About 7.30% of the population were Hispanic or Latino of any race.
Of the 7,127 households, 31.8% had children under 18 living with them, 54.2% were married couples living together, 14.5% had a female householder with no husband present, and 25.7% were not families. About 22.5% of all households were made up of individuals, and 10.4% had someone living alone who was 65 or older. The average household size was 2.65 and the average family size was 3.07.
In the county, the age distribution was 24.9% under 18, 9.20% from 18 to 24, 27.60% from 25 to 44, 23.80% from 45 to 64, and 14.50% who were 65 or older. The median age was 37 years. For every 100 females, there were 98.60 males. For every 100 females 18 and over, there were 95.30 males.
The median income for a household in the county was $35,774, and for a family was $41,603. Males had a median income of $29,221 versus $21,395 for females. The per capita income for the county was $16,328. About 12.00% of families and 15.60% of the population were below the poverty line, including 21.4% of those under 18 and 16.3% of those 65 or over.
United States
South Carolina 
