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Big Horn County, Wyoming facts for kids

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Big Horn County
Big Horn County Courthouse
Big Horn County Courthouse
Flag of Big Horn County
Map of Wyoming highlighting Big Horn County
Location within the U.S. state of Wyoming
Map of the United States highlighting Wyoming
Wyoming's location within the U.S.
Country  United States
State  Wyoming
Founded March 12, 1890 (authorized)
1897 (organized)
Seat Basin
Largest town Lovell
 • Total 3,159 sq mi (8,180 km2)
 • Land 3,137 sq mi (8,120 km2)
 • Water 22 sq mi (60 km2)  0.7%%
 • Total 11,668
 • Estimate 
 • Density 3.6936/sq mi (1.42610/km2)
Time zone UTC−7 (Mountain)
 • Summer (DST) UTC−6 (MDT)
Congressional district At-large

Big Horn County is a county in the U.S. state of Wyoming. As of the 2010 United States Census, the population was 11,668. The county seat is Basin. Its north boundary abuts the south boundary of Montana.


Big Horn County was created by the legislature of Wyoming Territory on March 12, 1890 and organized in 1897. The county was created with lands ceded by Fremont County, Johnson County, and Sheridan County.

Big Horn County was named for the Big Horn Mountains which form its eastern boundary. Originally, the county included the entire Big Horn Basin.

In 1909, Park County, was detached from Big Horn County. In 1911, Hot Springs County, and Washakie County were detached from Big Horn County. At that point in time, the county got its present borders.

The current sheriff of Big Horn County is Ken Blackburn.


According to the U.S. Census Bureau, the county has a total area of 3,159 square miles (8,180 km2), of which 3,137 square miles (8,120 km2) is land and 22 square miles (57 km2) (0.7%) is water.

Adjacent counties

Big Horn County in Wyoming and Montana are one of ten pairs of counties and parishes in the United States with the same name to border each other across state lines. The others are Sabine (Texas and Louisiana), Union (Arkansas and Louisiana), Bristol (Massachusetts and Rhode Island), Kent (Maryland and Delaware), Escambia (Alabama and Florida), Pike (Illinois and Missouri), Teton (Idaho and Wyoming), Park (Montana and Wyoming), and San Juan (New Mexico and Utah).

Major highways

  • US 14.svg U.S. Highway 14
  • US 14A.svg U.S. Highway 14A
  • US 16.svg U.S. Highway 16
  • US 20.svg U.S. Highway 20
  • US 310.svg U.S. Highway 310
  • WY-30.svg Wyoming Highway 30
  • WY-31.svg Wyoming Highway 31
  • WY-32.svg Wyoming Highway 32
  • WY-114.svg Wyoming Highway 114
  • WY-37.svg Wyoming Highway 37

National protected areas


Historical population
Census Pop.
1900 4,328
1910 8,886 105.3%
1920 12,105 36.2%
1930 11,222 −7.3%
1940 12,911 15.1%
1950 13,176 2.1%
1960 11,898 −9.7%
1970 10,202 −14.3%
1980 11,896 16.6%
1990 10,525 −11.5%
2000 11,461 8.9%
2010 11,668 1.8%
2020 (est.) 11,575 −0.8%
US Decennial Census
1870–2000 2010–2016

2010 census

As of the 2010 United States Census, there were 11,668 people, 4,561 households, and 3,179 families in the county. The population density was 3.7 inhabitants per square mile (1.4/km2). There were 5,379 housing units at an average density of 1.7 per square mile (0.66/km2). The racial makeup of the county was 94.4% white, 0.9% American Indian, 0.3% Asian, 0.2% black or African American, 3.0% from other races, and 1.2% from two or more races. Those of Hispanic or Latino origin made up 8.4% of the population. In terms of ancestry, 30.0% were German, 22.3% were English, 10.4% were Irish, 7.6% were Scottish, and 5.7% were American.

Of the 4,561 households, 31.0% had children under the age of 18 living with them, 58.2% were married couples living together, 7.6% had a female householder with no husband present, 30.3% were non-families, and 26.2% of all households were made up of individuals. The average household size was 2.52 and the average family size was 3.05. The median age was 41.8 years.

The median income for a household in the county was $48,270 and the median income for a family was $57,705. Males had a median income of $40,762 versus $31,440 for females. The per capita income for the county was $24,486. About 5.7% of families and 8.9% of the population were below the poverty line, including 11.2% of those under age 18 and 7.1% of those age 65 or over.



Census-designated places

Unincorporated communities


Big Horn County has four public school districts, Big Horn County School Districts 1-4:

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