As of the census of 2000, there were 7,828 people, 2,985 households, and 2,176 families residing in the county. The population density was 10 people per square mile (4/km²). There were 3,669 housing units at an average density of 5 per square mile (2/km²). The racial makeup of the county was 80.22% White, 6.77% Black or African American, 0.56% Native American, 0.29%Asian, 0.05% Pacific Islander, 10.42% from other races, and 1.67% from two or more races. 44.58% of the population were Hispanic or Latino of any race.
There were 2,985 households out of which 31.60% had children under the age of 18 living with them, 55.10% were married couples living together, 12.80% had a female householder with no husband present, and 27.10% were non-families. 24.60% of all households were made up of individuals and 11.50% had someone living alone who was 65 years of age or older. The average household size was 2.59 and the average family size was 3.07.
In the county, the population was spread out with 26.10% under the age of 18, 7.40% from 18 to 24, 25.90% from 25 to 44, 24.00% from 45 to 64, and 16.60% who were 65 years of age or older. The median age was 39 years. For every 100 females there were 95.80 males. For every 100 females age 18 and over, there were 92.40 males.
The median income for a household in the county was $29,986, and the median income for a family was $36,162. Males had a median income of $29,667 versus $16,565 for females. The per capita income for the county was $15,481. About 14.30% of families and 17.80% of the population were below the poverty line, including 24.20% of those under age 18 and 16.30% of those age 65 or over.