Jefferson County, Montana

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Template:Infobox U.S. county

Jefferson County is a county in Montana, United States. As of the 2020 census, the population was 12,085.[1] Its county seat is Boulder.[2] The county was created in 1865[3] and named for President Thomas Jefferson.[4]

Jefferson County is part of the Helena, MT Micropolitan Statistical Area.

Geography

According to the United States Census Bureau, the county has a total area of 1,659 square miles (4,300 km2), of which 1,656 square miles (4,290 km2) is land and 2.6 square miles (6.7 km2) (0.2%) is water.[5]

Major highways

Adjacent counties

National protected areas

Politics

United States presidential election results for Jefferson County, Montana[6]
Year Republican Democratic Third party
No.  % No.  % No.  %
1904 663 45.54% 580 39.84% 213 14.63%
1908 546 39.22% 714 51.29% 132 9.48%
1912 239 20.03% 479 40.15% 475 39.82%
1916 712 36.63% 1,124 57.82% 108 5.56%
1920 969 54.47% 688 38.67% 122 6.86%
1924 648 36.49% 434 24.44% 694 39.08%
1928 1,013 56.97% 751 42.24% 14 0.79%
1932 784 37.09% 1,246 58.94% 84 3.97%
1936 573 27.78% 1,409 68.30% 81 3.93%
1940 830 39.58% 1,259 60.04% 8 0.38%
1944 797 49.72% 803 50.09% 3 0.19%
1948 750 45.62% 836 50.85% 58 3.53%
1952 1,084 60.76% 687 38.51% 13 0.73%
1956 1,049 61.38% 660 38.62% 0 0.00%
1960 817 51.38% 769 48.36% 4 0.25%
1964 662 40.59% 967 59.29% 2 0.12%
1968 798 45.06% 820 46.30% 153 8.64%
1972 1,281 56.06% 904 39.56% 100 4.38%
1976 1,387 52.26% 1,210 45.59% 57 2.15%
1980 1,841 57.12% 1,055 32.73% 327 10.15%
1984 2,226 61.53% 1,324 36.59% 68 1.88%
1988 2,007 52.31% 1,746 45.50% 84 2.19%
1992 1,541 36.47% 1,415 33.49% 1,269 30.04%
1996 2,248 46.82% 1,775 36.97% 778 16.20%
2000 3,308 64.07% 1,513 29.30% 342 6.62%
2004 3,844 65.51% 1,881 32.06% 143 2.44%
2008 3,538 55.80% 2,582 40.72% 221 3.49%
2012 4,055 62.18% 2,272 34.84% 194 2.98%
2016 4,177 62.21% 1,998 29.76% 539 8.03%
2020 5,345 65.57% 2,625 32.20% 181 2.22%
2024 5,544 66.85% 2,516 30.34% 233 2.81%
2016 1 33.33% 1 33.33% 1 33.33%


Demographics

Template:US Census population

2020 census

As of the 2020 census, there were 12,085 people living in the county.[7] Of the residents, 20.8% were under the age of 18 and 24.0% were 65 years of age or older; the median age was 49.2 years. For every 100 females there were 103.1 males, and for every 100 females age 18 and over there were 101.8 males. 0.0% of residents lived in urban areas and 100.0% lived in rural areas.[8] The racial makeup of the county was 91.2% White, 0.1% Black or African American, 1.3% American Indian and Alaska Native, 0.4% Asian, 0.8% from some other race, and 6.2% from two or more races. Hispanic or Latino residents of any race comprised 2.4% of the population.[7] There were 4,894 households in the county, of which 26.5% had children under the age of 18 living with them and 16.3% had a female householder with no spouse or partner present. About 23.8% of all households were made up of individuals and 12.1% had someone living alone who was 65 years of age or older.[9] There were 5,375 housing units, of which 8.9% were vacant. Among occupied housing units, 85.2% were owner-occupied and 14.8% were renter-occupied. The homeowner vacancy rate was 0.9% and the rental vacancy rate was 6.6%.[9]

2010 census

As of the 2010 census, there were 11,406 people, 4,512 households, and 3,301 families residing in the county. The population density was 6.9 inhabitants per square mile (2.7/km2). There were 5,055 housing units at an average density of 3.1 per square mile (1.2/km2). The racial makeup of the county was 95.5% white, 1.4% American Indian, 0.4% Asian, 0.1% black or African American, 0.4% from other races, and 2.2% from two or more races. Those of Hispanic or Latino origin made up 2.0% of the population. In terms of ancestry, 31.3% were German, 19.1% were Irish, 17.2% were English, 10.8% were Norwegian, and 4.2% were American.

Of the 4,512 households, 28.8% had children under the age of 18 living with them, 63.7% were married couples living together, 5.4% had a female householder with no husband present, 26.8% were non-families, and 22.6% of all households were made up of individuals. The average household size was 2.48 and the average family size was 2.90. The median age was 46.2 years.

The median income for a household in the county was $56,695 and the median income for a family was $67,195. Males had a median income of $50,978 versus $34,148 for females. The per capita income for the county was $26,437. About 2.7% of families and 12.8% of the population were below the poverty line, including 5.1% of those under age 18 and 8.6% of those age 65 or over.

Communities

Towns

Census-designated places

Unincorporated communities

Former communities

Education

Whitehall Public Schools has two components: Whitehall Elementary School District and Whitehall High School District.[22]

High school districts include Jefferson High School District and Whitehall High School District.[23]

Elementary school districts include:[23]

See also

References

  1. ↑ "State & County QuickFacts". United States Census Bureau. Retrieved May 8, 2023.
  2. ↑ "Find a County". National Association of Counties. Archived from the original on May 31, 2011. Retrieved June 7, 2011.
  3. ↑ "Montana Place Names Companion". Montana Place Names From Alzada to Zortman. Montana Historical Society Research Center. Retrieved December 1, 2014.
  4. ↑ Gannett, Henry (1905). The Origin of Certain Place Names in the United States. Govt. Print. Off. p. 168.
  5. ↑ "2010 Census Gazetteer Files". United States Census Bureau. August 22, 2012. Archived from the original on December 5, 2014. Retrieved November 28, 2014.
  6. ↑ Leip, David. "Atlas of US Presidential Elections". uselectionatlas.org. Retrieved April 3, 2018.
  7. ↑ 7.0 7.1 "2020 Decennial Census Redistricting Data (Public Law 94-171)". United States Census Bureau. United States Census Bureau. 2021. Retrieved 2025-12-07.
  8. ↑ "2020 Decennial Census Demographic and Housing Characteristics (DHC)". United States Census Bureau. United States Census Bureau. 2023. Retrieved 2025-12-07.
  9. ↑ 9.0 9.1 "2020 Decennial Census Demographic Profile (DP1)". United States Census Bureau. United States Census Bureau. 2021. Retrieved 2025-12-07.
  10. ↑ Amazon, Jefferson County MT Google Maps (accessed January 2, 2019)
  11. ↑ Bernice, Jefferson County MT Google Maps (accessed January 2, 2019)
  12. ↑ Elk Park, Jefferson County MT Google Maps (accessed January 2, 2019)
  13. ↑ Homestake, Jefferson County MT Google Maps (accessed January 2, 2019)
  14. ↑ Leadville, Jefferson County MT Google Maps (accessed January 2, 2019)
  15. ↑ La Hood Park, Jefferson County MT Google Maps (accessed January 2, 2019)
  16. ↑ Louisville, Jefferson County MT Google Maps (accessed January 2, 2019)
  17. ↑ Pappas Place, Jefferson County MT Google Maps (accessed January 2, 2019)
  18. ↑ Paul Place, Jefferson County MT Google Maps (accessed January 2, 2019)
  19. ↑ Piedmont, Jefferson County MT Google Maps (accessed January 2, 2019)
  20. ↑ Pipestone, Jefferson County MT Google Maps (accessed January 2, 2019)
  21. ↑ Renova, Jefferson County MT Google Maps (accessed January 2, 2019)
  22. ↑ "Directory of Montana Schools". Montana Office of Public Instruction. March 13, 2024. pp. 143/317. Retrieved March 13, 2024.
  23. ↑ 23.0 23.1 "2020 CENSUS - SCHOOL DISTRICT REFERENCE MAP: Jefferson County, MT" (PDF). U.S. Census Bureau. Retrieved October 4, 2024. - Text list

Template:Geographic Location

Template:Jefferson County, Montana

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