2020 census As of the
2020 census, the county had a population of 84,414. Of the residents, 22.3% were under the age of 18 and 19.1% were 65 years of age or older; the median age was 38.9 years. For every 100 females there were 101.1 males, and for every 100 females age 18 and over there were 99.6 males. 79.5% of residents lived in urban areas and 20.5% lived in rural areas. The racial makeup of the county was 83.2% White, 1.4%
Black or African American, 4.7%
American Indian and Alaska Native, 1.1%
Asian, 1.3% from some other race, and 8.0% from
two or more races.
Hispanic or Latino residents of any race comprised 4.8% of the population. There were 35,011 households in the county, of which 27.0% had children under the age of 18 living with them and 26.2% had a female householder with no spouse or partner present. About 32.6% of all households were made up of individuals and 14.2% had someone living alone who was 65 years of age or older. There were 38,937 housing units, of which 10.1% were vacant. Among occupied housing units, 64.7% were owner-occupied and 35.3% were renter-occupied. The homeowner vacancy rate was 1.9% and the rental vacancy rate was 7.7%.
2010 census As of the
2010 census, 81,327 people, 33,809 households, and 21,403 families in the county. The population density was . There were 37,276 housing units at an average density of . The county's racial makeup was 89.2% white, 4.3% American Indian, 1.2% black or African American, 0.8% Asian, 0.1% Pacific Islander, 0.6% other races, and 3.6% from two or more races. Those of Hispanic or Latino origin made up 3.3% of the population. In terms of ancestry, 28.5% were
German, 17.1% were
Irish, 12.3% were
English, 10.3% were
Norwegian, and 4.5% were
American. Of the 33,809 households, 29.8% had children under the age of 18 living with them, 48.4% were married couples living together, 10.2% had a female householder with no husband present, 36.7% were non-families, and 30.5% of all households were made up of individuals. The average household size was 2.33 and the average family size was 2.90. The median age was 38.9 years. The median income for a household in the county was $42,389, and the median income for a family was $53,540. Males had a median income of $37,904 versus $27,944 for females. The per capita income for the county was $22,963. About 10.9% of families and 13.5% of the population were below the
poverty line, including 20.4% of those under age 18 and 8.8% of those age 65 or over. ==Government and politics==