The average household size was 2.49 and the average family size was 2.98. The county population contained 27.10% under the age of 18, 7.10% from 18 to 24, 28.20% from 25 to 44, 26.60% from 45 to 64, and 11.00% who were 65 years of age or older. The median age was 38 years. For every 100 females, there were 101.60 males. For every 100 females age 18 and over, there were 98.00 males. The median income for a household in the county was $41,170, and the median income for a family was $47,197. Males had a median income of $29,911 versus $20,898 for females. The per capita income for the county was $20,300. About 6.60% of families and 8.70% of the population were below the poverty line, including 10.80% of those under age 18 and 12.80% of those age 65 or over. As of the 2010 United States Census, there were 2,966 people, 1,228 households, and 857 families in the county. The population density was . There were 1,387 housing units at an average density of . The racial makeup of the county was 90.0% white, 6.6% American Indian, 0.3% black or African American, 0.1% Asian, 0.2% from other races, and 2.8% from two or more races. Those of Hispanic or Latino origin made up 0.7% of the population. In terms of ancestry, 46.4% were German, 12.5% were Irish, 10.8% were English, 10.7% were Norwegian, 8.4% were Czech, 5.0% were Swedish, and 2.5% were American. Of the 1,228 households, 30.8% had children under the age of 18 living with them, 56.7% were married couples living together, 8.5% had a female householder with no husband present, 30.2% were non-families, and 26.2% of all households were made up of individuals. The average household size was 2.42 and the average family size was 2.87. The median age was 41.9 years. The median income for a household in the county was $51,875 and the median income for a family was $54,722. Males had a median income of $33,929 versus $25,574 for females.