2020 census
As of the 2020 census, the county had a population of 7,578. Of the residents, 23.2% were under the age of 18 and 22.9% were 65 years of age or older; the median age was 44.1 years. For every 100 females there were 105.0 males, and for every 100 females age 18 and over there were 104.5 males. 0.0% of residents lived in urban areas and 100.0% lived in rural areas. [11] [12] [13]
The racial makeup of the county was 84.3% White, 0.2% Black or African American, 9.2% American Indian and Alaska Native, 0.3% Asian, 0.9% from some other race, and 5.1% from two or more races. Hispanic or Latino residents of any race comprised 2.3% of the population. [13]
There were 3,221 households in the county, of which 25.8% had children under the age of 18 living with them and 22.4% had a female householder with no spouse or partner present. About 33.9% of all households were made up of individuals and 15.7% had someone living alone who was 65 years of age or older. [12]
There were 4,229 housing units, of which 23.8% were vacant. Among occupied housing units, 72.0% were owner-occupied and 28.0% were renter-occupied. The homeowner vacancy rate was 2.6% and the rental vacancy rate was 13.1%. [12]
2010 census
As of the 2010 census, there were 7,369 people, 3,198 households, and 1,997 families living in the county. The population density was 1.5 inhabitants per square mile (0.58/km2). There were 4,879 housing units at an average density of 1.0 units per square mile (0.39/km2). The racial makeup of the county was 87.0% white, 9.8% American Indian, 0.5% Asian, 0.2% black or African American, 0.3% from other races, and 2.1% from two or more races. Those of Hispanic or Latino origin made up 1.2% of the population. In terms of ancestry, 33.4% were German, 27.9% were Norwegian, 12.4% were Irish, 10.3% were English, and 6.8% were American.
Of the 3,198 households, 26.9% had children under the age of 18 living with them, 50.3% were married couples living together, 8.0% had a female householder with no husband present, 37.6% were non-families, and 33.4% of all households were made up of individuals. The average household size was 2.26 and the average family size was 2.88. The median age was 46.4 years.
The median income for a household in the county was $42,050 and the median income for a family was $54,096. Males had a median income of $40,802 versus $30,272 for females. The per capita income for the county was $24,305. About 5.7% of families and 10.1% of the population were below the poverty line, including 17.0% of those under age 18 and 11.8% of those age 65 or over.
United States
Montana 
