As of the census of 2000, there were 24,843 people, 10,107 households, and 7,287 families residing in the county. The population density was 40 people per square mile (16/km²). There were 12,502 housing units at an average density of 20 per square mile (8/km²). The racial makeup of the county was 97.32% White, 0.038% Black or Race (United States Census), 0.46% Native American, 0.13% Asian, 0.01% Pacific Islander, 0.90% from other races, and 0.81% from two or more races. Nearly 1.5% of the population were Hispanic or Latino of any race.
There were 10,107 households, out of which 31.80% had children under the age of 18 living with them, 59.6% were married couples living together, 9.10% had a female householder with no husband present, and 27.9% were non-families. Nearly 25.6% of all households were made up of individuals, and 11.4% had someone living alone who was 65 years of age or older. The average household size was 2.43, and the average family size was 2.89.
In the county, the population was spread out with 23.7% under the age of 18, 7.90% from 18 to 24, 28.7% from 25 to 44, 25.5% from 45 to 64, and 14.2% who were 65 years of age or older. The median age was 38 years. For every 100 females, there were 96 males. For every 100 females age 18 and over, there were 93.5 males.
The median income for a household in the county was $28,435, and the median income for a family was $32,628. Males had a median income of $26,206 versus $17,760 for females. The per capita income for the county was $15,738. 17.1% of the population and 12.9% of families were below the poverty line. 21.8% of those under the age of 18 and 23% of those 65 and older were living below the poverty line.