Mineral County is a county located in the U.S. state of Montana. As of the 2020 census, the population was 4,535. Its county seat is Superior.
According to the United States Census Bureau, the county has a total area of , of which is land and (0.3%) is water.
Mineral County has voted for the Republican Party candidate in all national elections since 2000. Before that, its voting was more balanced.
As of the 2020 census, the county had a population of 4,535. Of the residents, 18.0% were under the age of 18 and 28.6% were 65 years of age or older; the median age was 52.8 years. For every 100 females there were 105.6 males, and for every 100 females age 18 and over there were 106.0 males. 0.0% of residents lived in urban areas and 100.0% lived in rural areas.
The racial makeup of the county was 90.3% White, 0.2% Black or African American, 1.5% American Indian and Alaska Native, 0.5% Asian, 0.9% from some other race, and 6.4% from two or more races. Hispanic or Latino residents of any race comprised 3.2% of the population.
There were 2,040 households in the county, of which 20.1% had children under the age of 18 living with them and 20.7% had a female householder with no spouse or partner present. About 31.3% of all households were made up of individuals and 15.9% had someone living alone who was 65 years of age or older.
There were 2,563 housing units, of which 20.4% were vacant. Among occupied housing units, 75.5% were owner-occupied and 24.5% were renter-occupied. The homeowner vacancy rate was 1.6% and the rental vacancy rate was 7.1%.
As of the 2010 census, there were 4,223 people, 1,911 households, and 1,229 families in the county. The population density was . There were 2,446 housing units at an average density of . The racial makeup of the county was 94.9% white, 1.5% American Indian, 0.7% Asian, 0.3% black or African American, 0.2% from other races, and 2.4% from two or more races. Those of Hispanic or Latino origin made up 1.9% of the population. In terms of ancestry, 30.9% were German, 16.9% were Irish, 15.4% were English, and 3.0% were American.
Of the 1,911 households, 21.9% had children under the age of 18 living with them, 52.4% were married couples living together, 7.3% had a female householder with no husband present, 35.7% were non-families, and 29.7% of all households were made up of individuals. The average household size was 2.20 and the average family size was 2.69. The median age was 49.8 years.
The median income for a household in the county was $37,256 and the median income for a family was $44,271. Males had a median income of $35,536 versus $20,370 for females. The per capita income for the county was $19,209. About 12.7% of families and 19.0% of the population were below the poverty line, including 36.0% of those under age 18 and 4.3% of those age 65 or over.