|Natrona County, Wyoming|
Natrona County Courthouse in Casper
Location in the U.S. state of Wyoming
Wyoming's location in the U.S.
|Named for||Natron deposits|
|• Total||5,376 sq mi (13,924 km2)|
|• Land||5,340 sq mi (13,831 km2)|
|• Water||35 sq mi (91 km2), 0.7%|
|• ( 2016)||81,039|
|• Density||15/sq mi (6/km2)|
|Time zone||Mountain: UTC−7/ −6|
Natrona County comprises the Casper, WY Metropolitan Statistical Area.
The first Euro-American settlement occurred in the Casper area in the late 19th century.  Natrona County was created by the legislature of the Wyoming Territory on March 9, 1888, and it was organized in 1890.  The land for Natrona County was ceded from Carbon County.
Natrona County was named for the deposits of natron found in the area.  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.
- Johnson County (north)
- Converse County (east)
- Carbon County (south)
- Fremont County (west)
- Washakie County (northwest)
|U.S. Decennial Census
1870–2000  2010–2016 
As of the census  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.
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.
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.
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.
As of the 2010 United States Census, there were 75,450 people, 30,616 households, and 19,714 families residing in the county.  The population density was 14.1 inhabitants per square mile (5.4/km2). There were 33,807 housing units at an average density of 6.3 per square mile (2.4/km2).  The racial makeup of the county was 92.8% white, 1.0% American Indian, 0.9% black or African American, 0.7% Asian, 0.1% Pacific islander, 2.2% from other races, and 2.4% from two or more races. Those of Hispanic or Latino origin made up 6.9% of the population.  In terms of ancestry, 27.2% were German, 15.2% were Irish, 13.2% were English, and 10.7% were American. 
Of the 30,616 households, 31.9% had children under the age of 18 living with them, 48.1% were married couples living together, 10.9% had a female householder with no husband present, 35.6% were non-families, and 28.5% of all households were made up of individuals. The average household size was 2.41 and the average family size was 2.94. The median age was 36.8 years. 
The median income for a household in the county was $50,936 and the median income for a family was $62,859. Males had a median income of $47,610 versus $30,664 for females. The per capita income for the county was $28,235. About 5.4% of families and 8.4% of the population were below the poverty line, including 9.9% of those under age 18 and 8.8% of those age 65 or over. 
- Casper (county seat)
Like almost all of Wyoming, Natrona is a powerfully Republican county. Bill Clinton did win a 100-vote plurality in the 1992 election due to a strong vote for Ross Perot, but no Democratic Presidential candidate has won forty percent of the county’s vote since Lyndon Johnson garnered 52 percent in his 1964 landslide against Barry Goldwater. In 2016 Donald J. Trump received 70.6% of the vote, the highest county vote percentage for any presidential candidate since Wyoming statehood in 1890.
Natrona County is governed by the Board of County Commissioners who meet in the county seat of Casper. 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.
Current commissioners are:
- Forrest Chadwick (Chairman) – Republican
- John Lawson (Vice-Chairman) – Republican
- Matt Keating – Republican
- Rob Hendry – Republican
- Steve Schlager – Republican
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- Leip, David. "Dave Leip's Atlas of U.S. Presidential Elections". Uselectionatlas.org. Retrieved 9 January 2018.
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