Yellowstone County, Montana facts for kids

Kids Encyclopedia Facts
Yellowstone County, Montana
Seal of Yellowstone County, Montana
Map
Map of Montana highlighting Yellowstone County
Location in the state of Montana
Map of the USA highlighting Montana
Montana's location in the U.S.
Statistics
Founded February 26, 1883
Seat Billings
Largest City Billings
Area
 - Total
 - Land
 - Water

2,649 sq mi (6,861 km²)
2,633 sq mi (6,819 km²)
16 sq mi (41 km²), 0.6%
PopulationEst.
 - (2015)
 - Density

157,048
59/sq mi (23/km²)
Time zone Mountain: UTC-7/-6
Website: www.co.yellowstone.mt.gov
Named for: Yellowstone River

Yellowstone County is the most populous county in the U.S. state of Montana. As of the 2010 census, the population was 147,972, and a 2014 estimate put the population at 155,634. Its county seat is Billings. Yellowstone County is named for the Yellowstone River which roughly bisects the county from southwest to northeast. The river in turn was named after the yellow Sandstone cliffs in what is now Yellowstone County.

Yellowstone County is included in the Billings, MT Metropolitan Statistical Area.

Geography

According to the U.S. Census Bureau, the county has a total area of 2,649 square miles (6,860 km2), of which 2,633 square miles (6,820 km2) is land and 16 square miles (41 km2) (0.6%) is water.

Major highways

  • I-90.svg Interstate 90
  • I-94.svg Interstate 94
  • US 12.svg U.S. Highway 12
  • US 87.svg U.S. Highway 87
  • US 212.svg U.S. Highway 212
  • US 310.svg U.S. Highway 310
  • US 312.svg U.S. Highway 312
  • MT-3.svg Montana Highway 3
  • MT-47.svg Montana Highway 47

Adjacent counties

National protected areas

Demographics

Historical population
Census Pop.
1890 2,065
1900 6,212 200.8%
1910 22,944 269.3%
1920 29,600 29.0%
1930 30,785 4.0%
1940 41,182 33.8%
1950 55,875 35.7%
1960 79,016 41.4%
1970 87,367 10.6%
1980 108,035 23.7%
1990 113,419 5.0%
2000 129,352 14.0%
2010 147,972 14.4%
Est. 2015 157,048 6.1%
U.S. Decennial Census
1790-1960 1900-1990
1990-2000 2010-2015

2000 census

As of the census of 2000, there were 129,352 people, 52,084 households, and 34,219 families residing in the county. The population density was 49 people per square mile (19/km²). There were 54,563 housing units at an average density of 21 per square mile (8/km²). The racial makeup of the county was 92.78% White, 0.45% Black or African American, 3.05% Native American, 0.54% Asian, 0.04% Pacific Islander, 1.26% from other races, and 1.87% from two or more races. 3.70% of the population were Hispanic or Latino of any race. 31.1% were of German, 10.4% Norwegian, 9.7% Irish, 9.3% English and 5.4% American ancestry.

There were 52,084 households out of which 31.60% had children under the age of 18 living with them, 51.80% were married couples living together, 10.10% had a female householder with no husband present, and 34.30% were non-families. 27.90% of all households were made up of individuals and 10.10% had someone living alone who was 65 years of age or older. The average household size was 2.43 and the average family size was 2.98.

In the county, the population was spread out with 25.50% under the age of 18, 9.30% from 18 to 24, 28.70% from 25 to 44, 23.20% from 45 to 64, and 13.30% who were 65 years of age or older. The median age was 37 years. For every 100 females there were 95.20 males. For every 100 females age 18 and over, there were 91.60 males.

The median income for a household in the county was $36,727, and the median income for a family was $45,277. Males had a median income of $33,475 versus $21,566 for females. The per capita income for the county was $19,303. About 8.50% of families and 11.10% of the population were below the poverty line, including 14.50% of those under age 18 and 7.40% of those age 65 or over.

2010 census

As of the 2010 United States Census, there were 147,972 people, 60,672 households, and 38,367 families residing in the county. The population density was 56.2 inhabitants per square mile (21.7/km2). There were 63,943 housing units at an average density of 24.3 per square mile (9.4/km2). The racial makeup of the county was 90.7% white, 4.0% American Indian, 0.6% black or African American, 0.6% Asian, 0.1% Pacific islander, 1.2% from other races, and 2.8% from two or more races. Those of Hispanic or Latino origin made up 4.7% of the population. In terms of ancestry, 32.4% were German, 14.0% were Irish, 11.3% were English, 10.0% were American, and 9.9% were Norwegian.

Yellowstone County vote
by party in presidential elections
Year Republican Democratic
2016 59.6% 38,675 32.5% 21,117
2012 58.9% 40,500 38.4% 26,403
2008 51.6% 36,483 45.3% 32,038
2004 61.7% 40,903 36.4% 24,120
2000 59.0% 33,922 35.4% 20,370
1996 47.2% 26,367 41.1% 22,992
1992 40.4% 22,822 35.7% 20,163
1988 55.4% 28,069 43.4% 21,987
1984 63.0% 34,124 35.9% 19,437
1980 56.6% 27,332 31.6% 15,272
1976 57.1% 25,201 41.5% 18,329
1972 62.6% 25,205 33.8% 13,602
1968 58.8% 19,898 34.5% 11,682
1964 46.8% 15,571 52.5% 17,446
1960 60.8% 19,467 38.6% 12,356

Of the 60,672 households, 30.5% had children under the age of 18 living with them, 48.0% were married couples living together, 10.5% had a female householder with no husband present, 36.8% were non-families, and 29.7% of all households were made up of individuals. The average household size was 2.38 and the average family size was 2.94. The median age was 38.3 years.

The median income for a household in the county was $48,641 and the median income for a family was $62,380. Males had a median income of $42,899 versus $30,403 for females. The per capita income for the county was $26,152. About 7.9% of families and 11.2% of the population were below the poverty line, including 15.6% of those under age 18 and 7.7% of those age 65 or over.

Communities

Cities

Town

Census-designated places

Unincorporated communities

Ghost towns


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