Stillwater County, Montana Facts for Kids

Quick facts for kids Stillwater County
U.S. county
Beartooth Mountains from Park City
Location within the U.S. state of Montana
Montana's location within the U.S.
Country	United States
State	Montana
Founded	1913
Named for	Stillwater River
Seat	Columbus
Largest town	Columbus
Area
• 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%
Population (2020)
• 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 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.

Geography
Demographics
- 2010 census
Communities
See also

Geography

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

Interstate 90
U.S. Highway 10 (Former)
Montana Highway 78

Adjacent counties

National protected areas

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

Demographics

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.