|Teton County, Idaho|
Teton County Courthouse
Location in the U.S. state of Idaho
Idaho's location in the U.S.
|Founded||January 26, 1915|
|Named for||The Teton Mountains|
|• Total||451 sq mi (1,168 km2)|
|• Land||449 sq mi (1,163 km2)|
|• Water||1.1 sq mi (3 km2), 0.2%|
|• ( 2017)||11,381|
|• Density||23/sq mi (9/km2)|
|Time zone||Mountain: UTC−7/ −6|
Teton County is a county located in the U.S. state of Idaho. As of the 2010 census, the population was 10,170.  The county seat is Driggs,  and the largest city is Victor. The county was established in 1915 and was named after the Teton Mountains to the east. 
The Teton Valley was discovered by John Colter in 1808, a member of the Lewis and Clark Expedition (1804–06). It became known as Pierre's Hole, and it hosted the well-attended 1832 Rendezvous, which was followed by the Battle of Pierre's Hole.
According to the U.S. Census Bureau, the county has a total area of 451 square miles (1,170 km2), of which 449 square miles (1,160 km2) is land and 1.1 square miles (2.8 km2) (0.2%) is water.  It is the second-smallest county in Idaho by area.
- Fremont County, to the north.
- Madison County, to the west.
- Bonneville County, to the south.
- Teton County, Wyoming, to the east.
Teton County, Idaho and Teton County, Wyoming are two of twenty-two counties or parishes in the United States with the same name to border each other across state lines. The others are Big Horn County, Montana and Big Horn County, Wyoming; Bristol County, Massachusetts and Bristol County, Rhode Island; Escambia County, Alabama and Escambia County, Florida; Kent County, Delaware and Kent County, Maryland; Park County, Montana and Park County, Wyoming; Pike County, Illinois and Pike County, Missouri; Sabine County, Texas and Sabine Parish, Louisiana; San Juan County, New Mexico and San Juan County, Utah; Union Parish, Louisiana and Union County, Arkansas; and Vermilion County, Illinois and Vermillion County, Indiana (both these counties are named for the Vermilion River, despite their different spellings).
- Targhee National Forest (part)
|U.S. Decennial Census
1790-1960  1900-1990 
1990-2000  2010-2013 
As of the census  of 2000, there were 5,999 people, 2,078 households, and 1,464 families residing in the county. The population density was 13 people per square mile (5/km²). There were 2,632 housing units at an average density of 6 per square mile (2/km²). The racial makeup of the county was 91.32% White, 0.17% Black or African American, 0.55% Native American, 0.18% Asian, 0.23% Pacific Islander, 6.73% from other races, and 0.82% from two or more races. 11.75% of the population were Hispanic or Latino of any race. 25.5% were of English, 15.8% German, 7.6% American and 5.1% Irish ancestry according to Census 2000.
There were 2,078 households out of which 39.70% had children under the age of 18 living with them, 60.30% were married couples living together, 5.80% had a female householder with no husband present, and 29.50% were non-families. 21.30% of all households were made up of individuals and 5.30% had someone living alone who was 65 years of age or older. The average household size was 2.87 and the average family size was 3.43.
In the county, the population was spread out with 31.80% under the age of 18, 8.10% from 18 to 24, 33.80% from 25 to 44, 18.90% from 45 to 64, and 7.50% who were 65 years of age or older. The median age was 31 years. For every 100 females, there were 112.70 males. For every 100 females age 18 and over, there were 114.50 males.
The median income for a household in the county was $41,968, and the median income for a family was $45,848. Males had a median income of $32,309 versus $22,243 for females. The per capita income for the county was $17,778. About 9.70% of families and 12.90% of the population were below the poverty line, including 18.10% of those under age 18 and 7.90% of those age 65 or over.
As of the 2010 United States Census, there were 10,170 people, 3,651 households, and 2,509 families residing in the county.  The population density was 22.6 inhabitants per square mile (8.7/km2). There were 5,478 housing units at an average density of 12.2 per square mile (4.7/km2).  The racial makeup of the county was 85.6% white, 0.5% Asian, 0.3% American Indian, 0.2% black or African American, 0.1% Pacific islander, 11.7% from other races, and 1.5% from two or more races. Those of Hispanic or Latino origin made up 16.9% of the population.  In terms of ancestry, 29.9% were English, 20.3% were German, 13.0% were Irish, and 4.2% were American. 
Of the 3,651 households, 39.3% had children under the age of 18 living with them, 58.9% were married couples living together, 5.9% had a female householder with no husband present, 31.3% were non-families, and 21.9% of all households were made up of individuals. The average household size was 2.78 and the average family size was 3.33. The median age was 33.2 years. 
The median income for a household in the county was $53,364 and the median income for a family was $56,791. Males had a median income of $39,865 versus $31,966 for females. The per capita income for the county was $23,633. About 5.4% of families and 7.4% of the population were below the poverty line, including 7.8% of those under age 18 and 2.2% of those age 65 or over. 
Similar to other Idaho counties, an elected three-member county commission heads the county government. Other elected officials include clerk, treasurer, sheriff, assessor, coroner, and prosecutor. 
Until quite recently Teton County voted Republican along with most other Eastern Idaho counties. However, since 2004 the county has strongly trended towards the Democratic Party. In 2008 it was one of three Idaho counties to vote for Barack Obama in the 2008 presidential election  despite giving George W. Bush a 23-point victory only four years earlier. 
At the state level Teton County is located in District 31 of the Idaho Legislature.  As counties neighboring Teton County are still strongly Republican, Republicans currently control the district. 
The public schools are operated by Teton School District #401, led by the county's only traditional high school, Teton High School, in Driggs.
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- Teton County Idaho
- 2008 - General Election Teton County Archived 2008-11-06 at the Wayback Machine.
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