It is the home of Shaw AFB. Shaw is home to the 9th USAF HQ and the largest F-16 base in the USAF.
As of the census of 2000, there were 104,646 people, 37,728 households, and 27,616 families residing in the county. The population density was 157 people per square mile (61/km²). There were 41,751 housing units at an average density of 63 per square mile (24/km²). The racial makeup of the county was 70.13% White, 26.68% Black or African American, 0.27% Native American, 0.90% Asian, 0.06% Pacific Islander, 0.80% from other races, and 1.16% from two or more races. 1.83% of the population were Hispanic or Latino of any race.
There were 37,728 households out of which 36.50% had children under the age of 18 living with them, 50.20% were married couples living together, 18.30% had a female householder with no husband present, and 26.80% were non-families. 23.20% of all households were made up of individuals and 8.50% had someone living alone who was 65 years of age or older. The average household size was 2.68 and the average family size was 3.17.
In the county, the population was spread out with 28.10% under the age of 18, 10.50% from 18 to 24, 29.40% from 25 to 44, 20.70% from 45 to 64, and 11.20% who were 65 years of age or older. The median age was 33 years. For every 100 females there were 93.90 males. For every 100 females age 18 and over, there were 90.20 males.
The median income for a household in the county was $33,278, and the median income for a family was $38,970. Males had a median income of $28,083 versus $21,162 for females. The per capita income for the county was $15,657. About 13.10% of families and 16.20% of the population were below the poverty line, including 21.60% of those under age 18 and 17.40% of those age 65 or over.