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Natrona County, Wyoming

Natrona County, Wyoming
Natrona County Courthouse in Casper
Map of Wyoming highlighting Natrona County
Location in the state of Wyoming
Map of the United States highlighting Wyoming
Wyoming's location in the U.S.
Founded 1890
Named for Natron deposits
Seat Casper
Largest city Casper
 • Total 5,376 sq mi (13,924 km2)
 • Land 5,340 sq mi (13,831 km2)
 • Water 35 sq mi (91 km2), 0.7%
Population (est.)
 • (2014) 81,624
 • Density 15/sq mi (6/km²)
Congressional district At-large
Time zone Mountain: UTC-7/-6
Website .gov.natronacounty-wywww

Natrona County is a county located in the U.S. state of Wyoming. As of the 2010 census, the population was 75,450,[1] making it the second-most populous county in Wyoming. Its county seat is Casper.[2]

Natrona County comprises the Casper, WY Metropolitan Statistical Area.

In 2010, the center of population of Wyoming was located in Natrona County, near Alcova.[3]


  • History 1
  • Geography 2
    • Geographic features 2.1
    • Adjacent counties 2.2
    • National protected areas 2.3
    • Major highways 2.4
  • Demographics 3
  • Government 4
  • Communities 5
    • Cities 5.1
    • Towns 5.2
    • Census-designated places 5.3
    • Unincorporated communities 5.4
  • See also 6
  • References 7


The first Euro-American settlement occurred in the

  1. ^ a b "State & County QuickFacts". United States Census Bureau. Retrieved January 25, 2014. 
  2. ^ "Find a County". National Association of Counties. Retrieved 2011-06-07. 
  3. ^ "Centers of Population by State: 2010". United States Census Bureau. Retrieved May 14, 2014. 
  4. ^ Casper Wyoming history
  5. ^ Long, John H., ed. (2004). "Wyoming: Individual County Chronologies". Wyoming Atlas of Historical County Boundaries.  
  6. ^ Urbanek, Mae (1988). Wyoming Place Names. Missoula, MT: Mountain Press Publishing Company.  
  7. ^ "2010 Census Gazetteer Files". United States Census Bureau. August 22, 2012. Retrieved August 18, 2015. 
  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 August 18, 2015. 
  10. ^ "Historical Decennial Census Population for Wyoming Counties, Cities, and Towns". Wyoming Department of Administration & Information, Division of Economic Analysis. Retrieved January 25, 2014. 
  11. ^ "American FactFinder"
  12. ^ "American FactFinder".  


See also

Unincorporated communities

Census-designated places




Current commissioners are:

The board consists of five members who are each is elected to a four-year term, which is staggered so not more than three commissioners are elected at the same time. Elections for the County Commissioners occur at the General Election every two years.

Natrona County is governed by the Board of County Commissioners who meet in the county seat of Casper.


The median income for a household in the county was $36,619, and the median income for a family was $45,575. Males had a median income of $33,524 versus $21,374 for females. The per capita income for the county was $18,913. About 8.70% of families and 11.80% of the population were below the poverty line, including 16.20% of those under age 18 and 7.20% of those age 65 or over.

In the county the population was distributed as follows: 26.00% under the age of 18, 10.10% from 18 to 24, 27.90% from 25 to 44, 23.30% from 45 to 64, and 12.70% who were 65 years of age or older. The median age was 36 years. For every 100 females there were 97.70 males. For every 100 females age 18 and over, there were 95.00 males.

There were 26,819 households out of which 32.20% had children under the age of 18 living with them, 51.40% were married couples living together, 10.60% had a female householder with no husband present, and 33.80% were non-families. 27.50% of all households were made up of individuals and 9.40% had someone living alone who was 65 years of age or older. The average household size was 2.42 and the average family size was 2.95.

As of the census[12] of 2000, there were 66,533 persons, 26,819 households, and 17,754 families residing in the county. The population density was 12 people per square mile (5/km²). There were 29,882 housing units at an average density of 6 per square mile (2/km²). The racial makeup of the county was 94.15% White, 0.76% Black or African American, 1.03% Native American, 0.42% Asian, 0.04% Pacific Islander, 1.92% from other races, and 1.68% from two or more races. 4.90% of the population were Hispanic or Latino of any race. 24.6% were of German, 11.6% English, 11.3% American and 11.2% Irish ancestry according to Census 2000.

As of the 2010 United States Census, there were 75,450 people residing in the county. 92.8% were White, 1.0% Native American, 0.9% Black or African American, 0.7% Asian, 0.1% Pacific Islander, 2.2% of some other race and 2.4% of two or more races. 6.9% were Hispanic or Latino (of any race). 20.5% were of German, 19.6% American, 9.0% Irish and 9.0% English ancestry.[11]


Major highways

National protected areas

Adjacent counties

Geographic features

According to the U.S. Census Bureau, the county has a total area of 5,376 square miles (13,920 km2), of which 5,340 square miles (13,800 km2) is land and 35 square miles (91 km2) (0.7%) is water.[7]

Badlands of Hell's Half-Acre, Natrona Co.


Natrona County was named for the deposits of natron that are found in the area.[6] In 1909, Natrona County gained land from Fremont County. The boundaries were adjusted slightly in 1911 and 1931, and at that point the county gained its present outline.

. Carbon County The land for Natrona County was ceded from [5]

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