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Jefferson County is a county in Montana, United States. As of the 2020 census, the population was 12,085.[2] Its county seat is Boulder.[3] The county was created in 1865[4] and named for President Thomas Jefferson.[5]

Jefferson County
U.S. county
Jefferson County Courthouse in Boulder
Location within the U.S. state of Montana
Montana's location within the U.S.
Coordinates: 46.18°N 112.11°W / 46.18; -112.11
Country United States
State Montana
FoundedFebruary 2, 1865[1]
Named forThomas Jefferson
SeatBoulder
Largest townClancy
Area
 • Total1,659 sq mi (4,300 km2)
 • Land1,656 sq mi (4,290 km2)
 • Water2.6 sq mi (7 km2)  0.2%
Population
 (2020)
 • Total12,085
 • Estimate 
(2021)
12,470
 • Density7/sq mi (3/km2)
Time zoneUTC−7 (Mountain)
 • Summer (DST)UTC−6 (MDT)
Congressional districtAt-large
Websitewww.jeffersoncounty-mt.gov
  • Montana county number 51

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.[6]


Major highways



Adjacent counties



National protected areas



Politics


United States presidential election results for Jefferson County, Montana[7]
Year Republican Democratic Third party
No. %No. %No. %
2020 5,345 65.57% 2,625 32.20% 181 2.22%
2016 4,177 62.21% 1,998 29.76% 539 8.03%
2012 4,055 62.18% 2,272 34.84% 194 2.98%
2008 3,538 55.80% 2,582 40.72% 221 3.49%
2004 3,844 65.51% 1,881 32.06% 143 2.44%
2000 3,308 64.07% 1,513 29.30% 342 6.62%
1996 2,248 46.82% 1,775 36.97% 778 16.20%
1992 1,541 36.47% 1,415 33.49% 1,269 30.04%
1988 2,007 52.31% 1,746 45.50% 84 2.19%
1984 2,226 61.53% 1,324 36.59% 68 1.88%
1980 1,841 57.12% 1,055 32.73% 327 10.15%
1976 1,387 52.26% 1,210 45.59% 57 2.15%
1972 1,281 56.06% 904 39.56% 100 4.38%
1968 798 45.06% 820 46.30% 153 8.64%
1964 662 40.59% 967 59.29% 2 0.12%
1960 817 51.38% 769 48.36% 4 0.25%
1956 1,049 61.38% 660 38.62% 0 0.00%
1952 1,084 60.76% 687 38.51% 13 0.73%
1948 750 45.62% 836 50.85% 58 3.53%
1944 797 49.72% 803 50.09% 3 0.19%
1940 830 39.58% 1,259 60.04% 8 0.38%
1936 573 27.78% 1,409 68.30% 81 3.93%
1932 784 37.09% 1,246 58.94% 84 3.97%
1928 1,013 56.97% 751 42.24% 14 0.79%
1924 648 36.49% 434 24.44% 694 39.08%
1920 969 54.47% 688 38.67% 122 6.86%
1916 712 36.63% 1,124 57.82% 108 5.56%
1912 239 20.03% 479 40.15% 475 39.82%
1908 546 39.22% 714 51.29% 132 9.48%
1904 663 45.54% 580 39.84% 213 14.63%



Demographics


Historical population
CensusPop.%±
18701,531—
18802,46460.9%
18906,026144.6%
19005,330−11.5%
19105,6015.1%
19205,203−7.1%
19304,133−20.6%
19404,66412.8%
19504,014−13.9%
19604,2977.1%
19705,23821.9%
19807,02934.2%
19907,93912.9%
200010,04926.6%
201011,40613.5%
202012,0856.0%
2021 (est.)12,470[8]3.2%
U.S. Decennial Census[9]
1790-1960[10] 1900-1990[11]
1990-2000[12] 2010-2020[2]

2000 census


As of the 2000 United States census,[13] there were 10,049 people, 3,747 households, and 2,847 families in the county. The population density was 6 people per square mile (2/km2). There were 4,199 housing units at an average density of 2 per square mile (1/km2). The racial makeup of the county was 96.07% White, 0.14% Black or African American, 1.26% Native American, 0.42% Asian, 0.07% Pacific Islander, 0.38% from other races, and 1.66% from two or more races. 1.48% of the population were Hispanic or Latino of any race. 22.9% were of German, 13.1% English, 12.9% Irish, 7.9% Norwegian and 5.3% American ancestry.

There were 3,747 households, out of which 35.60% had children under the age of 18 living with them, 67.10% were married couples living together, 5.90% had a female householder with no husband present, and 24.00% were non-families. 20.20% of all households were made up of individuals, and 7.30% had someone living alone who was 65 years of age or older. The average household size was 2.62 and the average family size was 3.03.

The county population contained 27.80% under the age of 18, 5.20% from 18 to 24, 26.80% from 25 to 44, 29.90% from 45 to 64, and 10.30% who were 65 years of age or older. The median age was 40 years. For every 100 females, there were 100.80 males. For every 100 females age 18 and over, there were 100.40 males.

The median income for a household in the county was $41,506, and the median income for a family was $48,912. Males had a median income of $34,753 versus $25,011 for females. The per capita income for the county was $18,250. About 6.70% of families and 9.00% of the population were below the poverty line, including 10.40% of those under age 18 and 9.60% of those age 65 or over.


2010 census


As of the 2010 United States census, there were 11,406 people, 4,512 households, and 3,301 families residing in the county.[14] 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).[15] 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.[14] 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.[16]

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.[14]

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.[17]


Communities



Towns



Census-designated places



Unincorporated communities



Former communities



See also



References


  1. "Montana County Formation Table". genealogytrails.com. Retrieved April 3, 2018.
  2. "State & County QuickFacts". U.S. Census Bureau. Retrieved February 15, 2022.
  3. "Find a County". National Association of Counties. Archived from the original on May 31, 2011. Retrieved June 7, 2011.
  4. "Montana Place Names Companion". Montana Place Names From Alzada to Zortman. Montana Historical Society Research Center. Retrieved December 1, 2014.
  5. Gannett, Henry (1905). The Origin of Certain Place Names in the United States. Govt. Print. Off. p. 168.
  6. "2010 Census Gazetteer Files". US Census Bureau. August 22, 2012. Archived from the original on December 5, 2014. Retrieved November 28, 2014.
  7. Leip, David. "Atlas of US Presidential Elections". uselectionatlas.org. Retrieved April 3, 2018.
  8. "Annual Estimates of the Resident Population for Counties: April 1, 2020 to July 1, 2021". Retrieved June 26, 2022.
  9. "U.S. Decennial Census". U.S. Census Bureau. Retrieved November 28, 2014.
  10. "Historical Census Browser". University of Virginia Library. Retrieved November 28, 2014.
  11. "Population of Counties by Decennial Census: 1900 to 1990". U.S. Census Bureau. Retrieved November 28, 2014.
  12. "Census 2000 PHC-T-4. Ranking Tables for Counties: 1990 and 2000" (PDF). U.S. Census Bureau. Retrieved November 28, 2014.
  13. "U.S. Census website". U.S. Census Bureau. Retrieved January 31, 2008.
  14. "Profile of General Population and Housing Characteristics: 2010 Demographic Profile Data". US Census Bureau. Archived from the original on February 13, 2020. Retrieved January 10, 2016.
  15. "Population, Housing Units, Area, and Density: 2010 - County". U.S. Census Bureau. Archived from the original on February 13, 2020. Retrieved January 10, 2016.
  16. "Selected Social Characteristics in the US – 2006-2010 American Community Survey 5-Year Estimates". US Census Bureau. Archived from the original on February 13, 2020. Retrieved January 10, 2016.
  17. "Selected Economic Characteristics – 2006-2010 American Community Survey 5-Year Estimates". US Census Bureau. Archived from the original on February 13, 2020. Retrieved January 10, 2016.
  18. Amazon, Jefferson County MT Google Maps (accessed January 2, 2019)
  19. Bernice, Jefferson County MT Google Maps (accessed January 2, 2019)
  20. Elk Park, Jefferson County MT Google Maps (accessed January 2, 2019)
  21. Homestake, Jefferson County MT Google Maps (accessed January 2, 2019)
  22. Leadville, Jefferson County MT Google Maps (accessed January 2, 2019)
  23. La Hood Park, Jefferson County MT Google Maps (accessed January 2, 2019)
  24. Louisville, Jefferson County MT Google Maps (accessed January 2, 2019)
  25. Pappas Place, Jefferson County MT Google Maps (accessed January 2, 2019)
  26. Paul Place, Jefferson County MT Google Maps (accessed January 2, 2019)
  27. Piedmont, Jefferson County MT Google Maps (accessed January 2, 2019)
  28. Pipestone, Jefferson County MT Google Maps (accessed January 2, 2019)
  29. Renova, Jefferson County MT Google Maps (accessed January 2, 2019)


Wikimedia Commons has media related to Jefferson County, Montana.



На других языках

[de] Jefferson County (Montana)

Jefferson County[3] ist ein County im Bundesstaat Montana der Vereinigten Staaten. Der Sitz der Countyverwaltung (County Seat) befindet sich in Boulder. Benannt ist das County nach dem ehemaligen Präsidenten Thomas Jefferson.
- [en] Jefferson County, Montana

[ru] Джефферсон (округ, Монтана)

Округ Джефферсон (англ. Jefferson County) располагается в США, штате Монтана. Официально образован в 1864 году. По состоянию на 2010 год, численность населения составляла 11 406 человек. Получил своё название по имени третьего президента США Томаса Джефферсона.


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