As of the census of 2000, there were 9,615 people, 3,623 households, and 2,565 families residing in the county. The population density was 5/km² (13/mi²). There were 4,200 housing units at an average density of 2/km² (6/mi²). The racial makeup of the county was 99.07% White, 0.10% Black or African American, 0.20% Native American, 0.04% Asian, 0.01% Pacific Islander, 0.18% from other races, and 0.40% from two or more races. 0.43% of the population were Hispanic or Latino of any race.
There were 3,623 households out of which 34.80% had children under the age of 18 living with them, 63.60% were married couples living together, 4.30% had a female householder with no husband present, and 29.20% were non-families. 27.00% of all households were made up of individuals and 15.70% had someone living alone who was 65 years of age or older. The average household size was 2.60 and the average family size was 3.20.
In the county the population was spread out with 29.40% under the age of 18, 6.00% from 18 to 24, 24.20% from 25 to 44, 20.30% from 45 to 64, and 20.00% who were 65 years of age or older. The median age was 39 years. For every 100 females there were 100.10 males. For every 100 females age 18 and over, there were 97.10 males.
The median income for a household in the county was $33,435, and the median income for a family was $39,422. Males had a median income of $26,707 versus $18,370 for females. The per capita income for the county was $15,514. About 6.30% of families and 9.10% of the population were below the poverty line, including 10.70% of those under age 18 and 9.70% of those age 65 or over.