Stillwater County, Montana
Stillwater County is a county in the U.S. state of Montana. As of the 2020 census, the population was 8,963. Its county seat is Columbus. Geography
According to the United States Census Bureau, the county has a total area of , of which  is land and  (0.5%) is water. Major highways
  Interstate 90
  U.S. Highway 10 (Former)
  Montana Highway 78

Adjacent counties

 Golden Valley County - north
 Yellowstone County - east
 Carbon County - south
 Park County - southwest
 Sweet Grass County - west

National protected areas
 Custer National Forest (part)
 Grass Lake National Wildlife Refuge
 Hailstone National Wildlife Refuge

Demographics

2020 census
As of the census of 2020, there were 8,963 people. 2010 census
As of the census of 2010, there were 9,117 people, 3,796 households, and 2,657 families in the county. The population density was . There were 4,803 housing units at an average density of . 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. Politics
Stillwater County is a heavily Republican county in presidential elections. It has not voted for a Democratic presidential candidate since Franklin D. Roosevelt in 1936. Communities

Town
 Columbus (county seat)

Census-designated places
 Absarokee
 Fishtail
 Nye
 Park City
 Rapelje
 Reed Point

Unincorporated communities

 Beehive
 Dean
 Meyers Creek (partial)
 Molt
 Reed Point

Ghost towns
 Limestone
 Springtime
 Wheat Basin

See also
 List of lakes in Stillwater County, Montana
 List of mountains in Stillwater County, Montana
 National Register of Historic Places listings in Stillwater County, Montana

References

Further reading
 
 

 
1913 establishments in Montana
Populated places established in 1913