kids encyclopedia robot

Stillwater County, Montana facts for kids

Kids Encyclopedia Facts
Quick facts for kids
Stillwater County
Beartooth Mountains from Park City
Beartooth Mountains from Park City
Map of Montana highlighting Stillwater County
Location within the U.S. state of Montana
Map of the United States highlighting Montana
Montana's location within the U.S.
Country  United States
State  Montana
Founded 1913
Named for Stillwater River
Seat Columbus
Largest town Columbus
 • Total 1,805 sq mi (4,670 km2)
 • Land 1,795 sq mi (4,650 km2)
 • Water 9.2 sq mi (24 km2)  0.5%
 • Total 8,963
 • Density 4.9657/sq mi (1.9172/km2)
Time zone UTC−7 (Mountain)
 • Summer (DST) UTC−6 (MDT)
Congressional district At-large
  • Montana county number 32
Mouat mine
Mouat chromite mine and mill, 1942

Stillwater County is a county in the U.S. state of Montana. As of the 2020 United States Census, the population was 8,963. Its county seat is Columbus.


According to the U.S. Census Bureau, the county has a total area of 1,805 square miles (4,670 km2), of which 1,795 square miles (4,650 km2) is land and 9.2 square miles (24 km2) (0.5%) is water.

Major highways

Adjacent counties

National protected areas

  • Custer National Forest (part)
  • Hailstone National Wildlife Refuge
  • Halfbreed Lake National Wildlife Refuge


Historical population
Census Pop.
1920 7,630
1930 6,253 −18.0%
1940 5,694 −8.9%
1950 5,416 −4.9%
1960 5,526 2.0%
1970 4,632 −16.2%
1980 5,598 20.9%
1990 6,536 16.8%
2000 8,195 25.4%
2010 9,117 11.3%
2020 8,963 −1.7%
U.S. Decennial Census
1790-1960 1900-1990
1990-2000 2010-2020

2010 census

As of the 2010 United States Census, there were 9,117 people, 3,796 households, and 2,657 families in the county. The population density was 5.1 inhabitants per square mile (2.0/km2). There were 4,803 housing units at an average density of 2.7 per square mile (1.0/km2). The racial makeup of the county was 96.8% white, 0.8% American Indian, 0.3% Asian, 0.1% black or African American, 0.4% from other races, and 1.6% from two or more races. Those of Hispanic or Latino origin made up 2.3% of the population. In terms of ancestry, 34.7% were German, 14.1% were Irish, 14.0% were English, 10.8% were Norwegian, and 6.9% were American.

Of the 3,796 households, 28.9% had children under the age of 18 living with them, 60.6% were married couples living together, 6.0% had a female householder with no husband present, 30.0% were non-families, and 25.8% of all households were made up of individuals. The average household size was 2.37 and the average family size was 2.84. The median age was 45.7 years.

The median income for a household in the county was $57,227 and the median income for a family was $65,438. Males had a median income of $51,830 versus $26,909 for females. The per capita income for the county was $27,168. About 6.0% of families and 9.5% of the population were below the poverty line, including 17.9% of those under age 18 and 7.2% of those age 65 or over.



Census-designated places

Unincorporated communities

Ghost towns

See also

Kids robot.svg In Spanish: Condado de Stillwater para niños

National Hispanic Heritage Month on Kiddle
Hispanic Hollywood icons
Myrtle Gonzalez
Rita Hayworth
Dolores del Río
Katy Jurado
kids search engine
Stillwater County, Montana Facts for Kids. Kiddle Encyclopedia.