|Teton County, Wyoming|
Location within the U.S. state of Wyoming
Wyoming's location within the U.S.
|Founded||15 February 1921 (authorized)|
|Named for||Teton Range|
|• Total||4,216 sq mi (10,919 km2)|
|• Land||3,995 sq mi (10,347 km2)|
|• Water||221 sq mi (572 km2), 5.2%|
|• ( 2017)||23,265|
|• Density||5.8/sq mi (2.2/km2)|
|Time zone||Mountain: UTC−7/ −6|
Teton County is a county in the U.S. state of Wyoming. As of the 2010 United States Census, the population was 21,294.  Its county seat is Jackson.  Its west boundary line abuts the east line of the state of Idaho.
Teton County contains the Jackson Hole ski area, all of Grand Teton National Park, and 40.4% of Yellowstone National Park's total area, including over 96.6% of its water area (largely in Yellowstone Lake). 
Teton County was created February 15, 1921, from a portion of Lincoln County. Its governing organization was completed in 1922.  The county was named for the Teton Range.  The county was created because the inhabitants lived too far away from Kemmerer, the county seat of Lincoln County. The creation of the county required a special act of the Wyoming Legislature, because the area was too poor and had too few people to qualify for county status under the normal requirements.
|US Decennial Census
1870–2000  2010–2016 
As of the 2000 United States Census  there were 18,251 people, 7,688 households, and 4,174 families in the county. The population density was 5 people per square mile (2/km²). There were 10,267 housing units at an average density of 3 per square mile (1/km²). The racial makeup of the county was 93.59% White, 0.15% Black or African American, 0.53% Native American, 0.54% Asian, 0.03% Pacific Islander, 3.93% from other races, and 1.22% from two or more races. 6.49% of the population were Hispanic or Latino of any race. 19.2% were of German, 14.2% English, 11.7% Irish and 6.7% American ancestry.
There were 7,688 households out of which 25.60% had children under the age of 18 living with them, 45.30% were married couples living together, 5.70% had a female householder with no husband present, and 45.70% were non-families. 27.30% of all households were made up of individuals and 3.70% 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 19.90% under the age of 18, 9.80% from 18 to 24, 38.30% from 25 to 44, 25.00% from 45 to 64, and 6.90% who were 65 years of age or older. The median age was 35 years. For every 100 females, there were 114.30 males. For every 100 females age 18 and over, there were 115.50 males.
The median income for a household in the county was $54,614, and the median income for a family was $63,916. Males had a median income of $34,570 versus $29,132 for females. The per capita income for the county was $38,260. About 2.80% of families and 6.00% of the population were below the poverty line, including 5.70% of those under age 18 and 4.40% of those age 65 or over.
As of the 2010 United States Census, there were 21,294 people, 8,973 households, and 4,938 families in the county.  The population density was 5.3 inhabitants per square mile (2.0/km2). There were 12,813 housing units at an average density of 3.2 per square mile (1.2/km2).  The racial makeup of the county was 88.4% white, 1.1% Asian, 0.5% American Indian, 0.2% black or African American, 0.1% Pacific islander, 8.1% from other races, and 1.6% from two or more races. Those of Hispanic or Latino origin made up 15.0% of the population.  In terms of ancestry, 22.2% were German, 14.9% were English, 13.0% were Irish, and 11.1% were American. 
Of the 8,973 households, 25.5% had children under the age of 18 living with them, 45.7% were married couples living together, 5.6% had a female householder with no husband present, 45.0% were non-families, and 29.2% of all households were made up of individuals. The average household size was 2.34 and the average family size was 2.89. The median age was 36.9 years. 
The median income for a household in the county was $70,271 and the median income for a family was $90,596. Males had a median income of $40,594 versus $36,715 for females. The per capita income for the county was $42,224. About 5.1% of families and 8.2% of the population were below the poverty line, including 15.5% of those under age 18 and 0.8% of those age 65 or over. 
- Jackson (county seat)
Previously a staunchly Republican county, which produced Governor and U.S. Senator Clifford Hansen, Teton has become the most Democratic county in Wyoming, which is one of the most Republican states in the nation. The only Republican presidential candidate since 1992 to win Teton County was George W. Bush in 2000. In the 2008 election, Barack Obama carried Teton County by a 23.6 percentage point margin over John McCain, with McCain winning statewide by a 32.2 percentage point margin over Obama, his widest margin in any state. Albany County, which includes the University of Wyoming at Laramie, was the only other county in the state to have backed Obama. In 2004, Teton was the only Wyoming county won by John F. Kerry over George W. Bush.  In the 2016 election, Hillary Clinton beat Donald Trump by 57.9%–31.1%.  The county has, however, voted at times for Republican candidates for the governorship and United States Senate.
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