2020 census As of the
2020 census, the county had a population of 70,973. Of the residents, 21.5% were under the age of 18 and 19.5% were 65 years of age or older; the median age was 41.3 years. For every 100 females there were 97.0 males, and for every 100 females age 18 and over there were 95.6 males. 73.8% of residents lived in urban areas and 26.2% lived in rural areas. The racial makeup of the county was 88.8% White, 0.4%
Black or African American, 1.9%
American Indian and Alaska Native, 0.8%
Asian, 0.9% from some other race, and 7.1% from
two or more races.
Hispanic or Latino residents of any race comprised 3.7% of the population. There were 30,204 households in the county, of which 26.2% had children under the age of 18 living with them and 25.5% had a female householder with no spouse or partner present. About 31.6% of all households were made up of individuals and 13.1% had someone living alone who was 65 years of age or older. There were 33,599 housing units, of which 10.1% were vacant. Among occupied housing units, 68.3% were owner-occupied and 31.7% were renter-occupied. The homeowner vacancy rate was 1.4% and the rental vacancy rate was 5.1%.
2010 census As of the
2010 census, there were 63,395 people, 26,694 households, and 16,705 families in the county. The population density was . There were 30,180 housing units at an average density of . The racial makeup of the county was 94.0% white, 2.1% American Indian, 0.6% Asian, 0.3% black or African American, 0.1% Pacific islander, 0.5% from other races, and 2.4% from two or more races. Those of Hispanic or Latino origin made up 2.5% of the population. In terms of ancestry, 29.2% were
German, 19.3% were
Irish, 15.0% were
English, 8.9% were
Norwegian, and 5.1% were
American. Of the 26,694 households, 28.8% had children under the age of 18 living with them, 49.0% were married couples living together, 9.4% had a female householder with no husband present, 37.4% were non-families, and 30.7% of all households were made up of individuals. The average household size was 2.30 and the average family size was 2.87. The median age was 40.9 years. The median income for a household in the county was $50,238 and the median income for a family was $65,573. Males had a median income of $44,476 versus $34,893 for females. The per capita income for the county was $25,894. About 5.8% of families and 9.7% of the population were below the
poverty line, including 10.2% of those under age 18 and 4.1% of those age 65 or over. ==Politics==