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Campbell County, Wyoming facts for kids

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Campbell County
Campbell County Courthouse
Campbell County Courthouse
Flag of Campbell County
Map of Wyoming highlighting Campbell 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 February 21, 1911
Named for Robert Campbell
Seat Gillette
Largest city Gillette
 • Total 4,807 sq mi (12,450 km2)
 • Land 4,803 sq mi (12,440 km2)
 • Water 4.0 sq mi (10 km2)  0.08%%
 • Total 47,026
 • Density 9.7828/sq mi (3.7772/km2)
Time zone UTC−7 (Mountain)
 • Summer (DST) UTC−6 (MDT)
Congressional district At-large

Campbell County is a county in the U.S. state of Wyoming. As of the 2020 United States Census, the population was 47,026, making it the third-most populous county in Wyoming. Its county seat is Gillette.

Campbell County comprises the Gillette, WY Micropolitan Statistical Area.


Campbell County was created on February 21, 1911 with land detached from Crook County and Weston County.

Campbell County was named either for John Allen Campbell, a governor of the Wyoming Territory or for Robert Campbell, an early trapper, who was a fur trader associated with William Henry Ashley.


According to the U.S. Census Bureau, the county has a total area of 4,807 square miles (12,450 km2), of which 4,803 square miles (12,440 km2) is land and 4.0 square miles (10 km2) (9.6%) is water.

Adjacent counties

Major highways

  • I-90.svg Interstate 90
  • US 14.svg U.S. Highway 14
  • US 16.svg U.S. Highway 16
  • WY-50.svg Wyoming Highway 50
  • WY-51.svg Wyoming Highway 51
  • WY-59.svg Wyoming Highway 59
  • WY-450.svg Wyoming Highway 450
  • WY-387.svg Wyoming Highway 387

National protected area

  • Thunder Basin National Grassland (part)


Historical population
Census Pop.
1920 5,233
1930 6,720 28.4%
1940 6,048 −10.0%
1950 4,839 −20.0%
1960 5,861 21.1%
1970 12,957 121.1%
1980 24,367 88.1%
1990 29,370 20.5%
2000 33,698 14.7%
2010 46,133 36.9%
US Decennial Census
1870–2000 2010–2020

2010 census

As of the 2010 United States Census, there were 46,133 people, 17,172 households, and 11,933 families in the county. The population density was 9.6 inhabitants per square mile (3.7/km2). There were 18,955 housing units at an average density of 3.9 per square mile (1.5/km2). The racial makeup of the county was 93.2% white, 1.2% American Indian, 0.6% Asian, 0.3% black or African American, 2.7% from other races, and 2.1% from two or more races. Those of Hispanic or Latino origin made up 7.8% of the population. In terms of ancestry, 32.2% were German, 15.9% were Irish, 10.8% were English, 5.5% were American, and 5.1% were Norwegian.

Of the 17,172 households, 39.0% had children under the age of 18 living with them, 54.0% were married couples living together, 8.6% had a female householder with no husband present, 30.5% were non-families, and 22.4% of all households were made up of individuals. The average household size was 2.66 and the average family size was 3.11. The median age was 31.9 years.

The median income for a household in the county was $76,576 and the median income for a family was $83,965. Males had a median income of $61,393 versus $31,769 for females. The per capita income for the county was $31,968. About 5.9% of families and 6.9% of the population were below the poverty line, including 10.5% of those under age 18 and 3.9% of those age 65 or over.




Census-designated places

Unincorporated communities

Notable people

  • Tom Lubnau, Speaker of the Wyoming House of Representatives
  • Sue Wallis, Republican member of the Wyoming House from Campbell County

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