2020 census
As of the 2020 census, the county had a population of 4,971. Of the residents, 20.1% were under the age of 18 and 18.0% were 65 years of age or older; the median age was 41.0 years. For every 100 females there were 135.7 males, and for every 100 females age 18 and over there were 143.8 males. 0.0% of residents lived in urban areas and 100.0% lived in rural areas. [9] [10] [11]
The racial makeup of the county was 85.9% White, 0.6% Black or African American, 7.0% American Indian and Alaska Native, 0.7% Asian, 0.9% from some other race, and 4.8% from two or more races. Hispanic or Latino residents of any race comprised 3.6% of the population. [11]
There were 1,748 households in the county, of which 24.8% had children under the age of 18 living with them and 23.8% had a female householder with no spouse or partner present. About 34.5% of all households were made up of individuals and 14.8% had someone living alone who was 65 years of age or older. [10]
There were 2,320 housing units, of which 24.7% were vacant. Among occupied housing units, 68.5% were owner-occupied and 31.5% were renter-occupied. The homeowner vacancy rate was 5.6% and the rental vacancy rate was 21.5%. [10]
2010 census
As of the 2010 census, there were 5,324 people, 2,015 households, and 1,246 families in the county. The population density was 2.8 inhabitants per square mile (1.1/km2). There were 2,336 housing units at an average density of 1.2 units per square mile (0.46 units/km2). The racial makeup of the county was 92.0% white, 4.5% American Indian, 0.5% black or African American, 0.4% Asian, 0.6% from other races, and 1.9% from two or more races. Those of Hispanic or Latino origin made up 2.4% of the population. In terms of ancestry, 30.8% were German, 17.7% were Irish, 15.8% were English, 10.5% were Norwegian, and 3.6% were American.
Of the 2,015 households, 27.3% had children under the age of 18 living with them, 49.8% were married couples living together, 7.4% had a female householder with no husband present, 38.2% were non-families, and 34.3% 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 41.5 years.
The median income for a household in the county was $42,949 and the median income for a family was $54,722. Males had a median income of $41,490 versus $32,582 for females. The per capita income for the county was $20,464. About 11.3% of families and 15.7% of the population were below the poverty line, including 23.2% of those under age 18 and 8.0% of those age 65 or over.
United States
Montana 
