The Forrest City Micropolitan Statistical Area includes all of St. Francis County.
As of the census of 2000, there were 29,329 people, 10,043 households, and 7,230 families residing in the county. The population density was 18/km² (46/mi²). There were 11,242 housing units at an average density of 7/km² (18/mi²). The racial makeup of the county was 48.36% White, 49.01% Black or African American, 0.25% Native American, 0.56% Asian, 0.02% Pacific Islander, 0.40% from other races, and 1.40% from two or more races. 4.88% of the population were Hispanic or Latino of any race.
There were 10,043 households out of which 35.30% had children under the age of 18 living with them, 46.90% were married couples living together, 20.80% had a female householder with no husband present, and 28.00% were non-families. 25.10% of all households were made up of individuals and 10.80% had someone living alone who was 65 years of age or older. The average household size was 2.65 and the average family size was 3.17.
In the county the population was spread out with 27.90% under the age of 18, 9.90% from 18 to 24, 29.10% from 25 to 44, 21.20% from 45 to 64, and 11.90% who were 65 years of age or older. The median age was 34 years. For every 100 females there were 105.60 males. For every 100 females age 18 and over, there were 105.40 males.
The median income for a household in the county was $26,146, and the median income for a family was $30,324. Males had a median income of $28,389 versus $20,578 for females. The per capita income for the county was $12,483. About 23.10% of families and 27.50% of the population were below the poverty line, including 38.70% of those under age 18 and 23.10% of those age 65 or over.