As of the census of 2000, there were 14,702 people, 5,771 households, and 4,097 families residing in the county. The population density was 29 people per square mile (11/km²). There were 7,374 housing units at an average density of 14 per square mile (6/km²). The racial makeup of the county was 98.02% White, 0.69% Black or African American, 0.35% Native American, 0.11% Asian, 0.05% Pacific Islander, 0.08% from other races, and 0.71% from two or more races. 0.44% of the population were Hispanic or Latino of any race.
There were 5,771 households out of which 30.30% had children under the age of 18 living with them, 57.30% were married couples living together, 9.20% had a female householder with no husband present, and 29.00% were non-families. 25.20% of all households were made up of individuals and 12.40% had someone living alone who was 65 years of age or older. The average household size was 2.46 and the average family size was 2.92.
In the county, the population was spread out with 22.80% under the age of 18, 7.50% from 18 to 24, 28.10% from 25 to 44, 25.80% from 45 to 64, and 15.80% who were 65 years of age or older. The median age was 40 years. For every 100 females there were 102.60 males. For every 100 females age 18 and over, there were 103.00 males.
The median income for a household in the county was $24,412, and the median income for a family was $29,133. Males had a median income of $27,560 versus $17,778 for females. The per capita income for the county was $13,349. About 17.90% of families and 22.00% of the population were below the poverty line, including 27.90% of those under age 18 and 13.70% of those age 65 or over.