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Gallatin County, Montana

Gallatin County, Montana
Gallatin County Courthouse
Seal of Gallatin County, Montana
Map of Montana highlighting Gallatin County
Location in the state of Montana
Map of the United States highlighting Montana
Montana's location in the U.S.
Founded 1865
Named for Albert Gallatin
Seat Bozeman
Largest city Bozeman
 • Total 2,632 sq mi (6,817 km2)
 • Land 2,603 sq mi (6,742 km2)
 • Water 29 sq mi (75 km2), 1.1%
Population (est.)
 • (2014) 97,380
 • Density 37/sq mi (14/km²)
Congressional district At-large
Time zone Mountain: UTC-7/-6

Gallatin County is a county located in the U.S. state of Montana. As of the 2010 census, the population was 89,513,[1] making it the fourth-most populous county in Montana. Its county seat is Bozeman,[2] home of Montana State University. The county was founded in 1865.[3]

Gallatin County comprises the Bozeman, MT Micropolitan Statistical Area.

The prominent physical feature of the county is the Gallatin River, named by Meriwether Lewis in 1805 for Albert Gallatin,[4] U.S. Treasury Secretary from 1801-14. A small part of Yellowstone National Park lies in the southeastern portion of the county. The Big Sky Resort is about midway between West Yellowstone and Bozeman, though the ski area itself lies mostly in neighboring Madison County, Montana. The Gallatin River canyon is accessed by U.S. Highway 191. In the mid-19th century, a portion of Gallatin County was left over after the division of the Dakota Territory into other states. In 1873, the patch was attached to Montana and became part of Gallatin County.[5]


  • History 1
  • Geography 2
    • Major highways 2.1
    • Adjacent counties 2.2
    • National protected areas 2.3
  • Demographics 3
  • Communities 4
    • Cities 4.1
    • Towns 4.2
    • Census-designated places 4.3
    • Unincorporated communities 4.4
  • Notable residents 5
  • See also 6
  • References 7
  • External links 8


Lost Dakota, is a portion of land that was left over after the division of the Dakota Territory into other states in the late 19th century, was made part of Gallatin County in 1873.[6]


According to the U.S. Census Bureau, the county has a total area of 2,632 square miles (6,820 km2), of which 2,603 square miles (6,740 km2) is land and 29 square miles (75 km2) (1.1%) is water.[7] The county attained its present boundaries in 1978, when the former Yellowstone National Park (part) county-equivalent was dissolved and apportioned between Gallatin County and Park County. Gallatin County received 99.155 square miles (256.8 km2) of land area and 0.119 square miles (0.3 km2) of water area, whereas Park County received 146.229 square miles (378.7 km2) of land area and 0.608 square miles (1.6 km2) of water area. The geographies transferred are known now as Census Tract 14 in Gallatin County, and as Census Tract 6 in Park County.

Major highways

Adjacent counties

National protected areas


As of the census[13] of 2000, there were 67,831 people, 26,323 households, and 16,188 families residing in the county. The population density was 26 people per square mile (10/km²). There were 29,489 housing units at an average density of 11 per square mile (4/km²). The racial makeup of the county was:

1.54% of the population were Hispanic or Latino of any race. 23.7% were of German, 11.2% Irish, 10.4% English, 9.0% Norwegian and 5.5% American ancestry according to Census 2000.

There were 26,323 households out of which 29.70% had children under the age of 18 living with them, 51.80% were married couples living together, 6.60% had a female householder with no husband present, and 38.50% were non-families. 24.10% of all households were made up of individuals and 5.70% had someone living alone who was 65 years of age or older. The average household size was 2.46 and the average family size was 2.94.

In the county the population was spread out with 22.00% under the age of 18, 18.50% from 18 to 24, 30.40% from 25 to 44, 20.60% from 45 to 64, and 8.50% who were 65 years of age or older. The median age was 31 years. For every 100 females there were 108.30 males. For every 100 females age 18 and over, there were 108.70 males.

The median income for a household in the county was $38,120, and the median income for a family was $46,639. Males had a median income of $30,866 versus $21,330 for females. The per capita income for the county was $19,074. About 6.30% of families and 12.80% of the population were below the poverty line, including 10.50% of those under age 18 and 5.60% of those age 65 or over.




Census-designated places

Unincorporated communities

Notable residents

See also


  1. ^ a b "State & County QuickFacts". United States Census Bureau. Retrieved September 15, 2013. 
  2. ^ "Find a County". National Association of Counties. Retrieved 2011-06-07. 
  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. 133. 
  5. ^ Beyond 50: American States That Might Have Been : NPR
  6. ^ Beyond 50: American States That Might Have Been. NPR. Retrieved June 22, 2013.
  7. ^ "2010 Census Gazetteer Files". United States Census Bureau. August 22, 2012. Retrieved November 28, 2014. 
  8. ^ "Annual Estimates of the Resident Population for Incorporated Places: April 1, 2010 to July 1, 2014". Retrieved June 4, 2015. 
  9. ^ "U.S. Decennial Census". United States 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". United States Census Bureau. Retrieved November 28, 2014. 
  12. ^ "Census 2000 PHC-T-4. Ranking Tables for Counties: 1990 and 2000" (PDF). United States Census Bureau. Retrieved November 28, 2014. 
  13. ^ "American FactFinder".  

External links

  • Gallatin County, MT Official Website
  • Gallatin County Emergency Management
  • Census Tract 14, Gallatin County; Census Tract 6, Park County United States Census Bureau

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