|Johnson County, Wyoming|
Location within the U.S. state of Wyoming
Wyoming's location within the U.S.
|Founded||8 December 1875 (authorized)|
|• Total||4,175 sq mi (10,813 km2)|
|• Land||4,154 sq mi (10,759 km2)|
|• Water||20 sq mi (52 km2), 0.5%|
|• ( 2016)||8,486|
|• Density||2.1/sq mi (0.8/km2)|
|Time zone||Mountain: UTC−7/ −6|
Johnson County is a county in the north central part of the U.S. state of Wyoming. As of the 2010 United States Census, the population was 8,569.  The county seat is Buffalo.  Kaycee is the only other incorporated town in the county.
Johnson County was created on December 8, 1875 as Pease County from parts of Albany, Carbon, and Sweetwater Counties. It was organized in 1881.  The county was named for Dr. E. L. Pease of Uinta County. In 1879, the county was renamed Johnson, for E. P. Johnson, a Cheyenne attorney.  
In 1888, Sheridan County was created from a portion of Johnson County. In 1890, Big Horn County was created from Johnson County along with land from Fremont County and Sheridan County. In 1911, the boundaries of Johnson County and adjacent Crook, Natrona and Weston Counties were adjusted to run along federal land survey lines.
In April 1892, Johnson County was the scene of the Johnson County War, a range war between large cattle outfits and small stockgrowers.
- Bighorn National Forest (part)
|US Decennial Census
1870–2000  2010–2016 
As of the 2000 United States Census,  there were 7,075 people, 2,959 households, and 2,006 families in the county. The population density was 2 people per square mile (1/km²). There were 3,503 housing units at an average density of 0.8 per square mile (0.3/km²). The racial makeup of the county was 97.03% White, 0.08% Black or African American, 0.64% Native American, 0.11% Asian, 0.55% from other races, and 1.58% from two or more races. 2.09% of the population were Hispanic or Latino of any race. 27.0% were of German, 15.2% English, 10.8% Irish and 7.9% American ancestry.
There were 2,959 households out of which 28.70% had children under the age of 18 living with them, 57.00% were married couples living together, 7.10% had a female householder with no husband present, and 32.20% were non-families. 28.50% of all households were made up of individuals and 12.00% had someone living alone who was 65 years of age or older. The average household size was 2.36 and the average family size was 2.89.
The county population contained 24.20% under the age of 18, 5.60% from 18 to 24, 23.50% from 25 to 44, 28.70% from 45 to 64, and 18.00% who were 65 years of age or older. The median age was 43 years. For every 100 females there were 96.60 males. For every 100 females age 18 and over, there were 94.30 males.
The median income for a household in the county was $34,012, and the median income for a family was $42,299. Males had a median income of $29,271 versus $20,469 for females. The per capita income for the county was $19,030. About 7.20% of families and 10.10% of the population were below the poverty line, including 9.10% of those under age 18 and 10.60% of those age 65 or over.
As of the 2010 United States Census, there were 8,569 people, 3,782 households, and 2,410 families in the county.  The population density was 2.1 inhabitants per square mile (0.81/km2). There were 4,553 housing units at an average density of 1.1 per square mile (0.42/km2).  The racial makeup of the county was 96.5% white, 1.1% American Indian, 0.4% Asian, 0.2% black or African American, 0.7% from other races, and 1.1% from two or more races. Those of Hispanic or Latino origin made up 3.2% of the population.  In terms of ancestry, 31.6% were German, 22.4% were Irish, 18.3% were English, and 6.1% were American. 
Of the 3,782 households, 26.1% had children under the age of 18 living with them, 53.5% were married couples living together, 6.7% had a female householder with no husband present, 36.3% were non-families, and 31.8% of all households were made up of individuals. The average household size was 2.25 and the average family size was 2.83. The median age was 44.8 years. 
The median income for a household in the county was $45,638 and the median income for a family was $58,983. Males had a median income of $40,572 versus $30,352 for females. The per capita income for the county was $26,753. About 5.9% of families and 8.2% of the population were below the poverty line, including 8.0% of those under age 18 and 7.3% of those age 65 or over. 
- Buffalo (county seat)
Johnson County voters are reliably Republican. Since Wyoming statehood, the voters of this county have selected the Democratic Party candidate in only three national elections: William Jennings Bryan in 1896; Woodrow Wilson in 1912 by two votes and with only a 37.5 percent of the total vote (due to Roosevelt's independent run that year); and Franklin D. Roosevelt by seventy votes in his 1932 landslide. FDR did not carry the county in his re-election campaigns; in 1936 Johnson was Alf Landon’s second-best county in the Western United States behind Rio Blanco County, Colorado, and in the 1964 Democratic landslide it was Barry Goldwater’s best county in Wyoming and second-best in the West behind Utah’s traditional banner Republican county of Kane.
The Wyoming Department of Health Veteran’s Home of Wyoming, an assisted living facility for veterans and their dependents, is in Buffalo.   The Wyoming Board of Charities and Reform operated the facility until the agency was dissolved as a result of a state constitutional amendment passed in November 1990. 
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- Media related to Johnson County, Wyoming at Wikimedia Commons
- Buffalo, Wyoming Chamber of Commerce Website