Twin Falls County is a

county A county () is a geographic region of a country used for administrative or other purposesL. Brookes (ed.) '' Chambers Dictionary''. Edinburgh: Chambers Harrap Publishers Ltd, 2005. in some nations. The term is derived from the Old French denoti ...

in the south central part of the U.S. state of

Idaho Idaho ( ) is a landlocked U.S. state, state in the Pacific Northwest and Mountain states, Mountain West subregions of the Western United States. It borders Montana and Wyoming to the east, Nevada and Utah to the south, and Washington (state), ...

. As of the 2020 census, the population was 90,046, making it the fifth-most populous county in Idaho. The

county seat A county seat is an administrative center, seat of government, or capital city of a county or parish (administrative division), civil parish. The term is in use in five countries: Canada, China, Hungary, Romania, and the United States. An equiva ...

and largest city is Twin Falls. Twin Falls County is part of the Twin Falls, ID Twin Falls Metropolitan Statistical Area. Prior to the 1860s, the Twin Falls County area was an unorganized part of

Shoshone The Shoshone or Shoshoni ( or ), also known by the endonym Newe, are an Native Americans in the United States, Indigenous people of the United States with four large cultural/linguistic divisions: * Eastern Shoshone: Wyoming * Northern Shoshon ...

lands, then as part of the Oregon Country. The area was first organized as part of the original Owyhee County in 1864 as part of Idaho Territory. In 1879 it was partitioned away from Owyhee County to form part of Cassia County. The county is named for a split

waterfall A waterfall is any point in a river or stream where water flows over a vertical drop or a series of steep drops. Waterfalls also occur where meltwater drops over the edge of a tabular iceberg or ice shelf. Waterfalls can be formed in seve ...

on the

Snake River The Snake River is a major river in the interior Pacific Northwest region of the United States. About long, it is the largest tributary of the Columbia River, which is the largest North American river that empties into the Pacific Ocean. Begin ...

of the same name. The Snake River is the county's northern boundary. Even after Idaho became a state in 1890, the Twin Falls area was very sparsely populated and without significant settlements. That changed after the city of Twin Falls was founded in 1904, and Milner Dam was completed in 1905. Most of the county's other towns were established during this period as well. In response to local government needs for these new communities, which were as much as away from Cassia County's seat at Albion, Twin Falls County was created by the Idaho Legislature on February 21, 1907.

Geography

According to the

United States Census Bureau The United States Census Bureau, officially the Bureau of the Census, is a principal agency of the Federal statistical system, U.S. federal statistical system, responsible for producing data about the American people and American economy, econ ...

, the county has a total area of , of which is land and (0.4%) is water.

Adjacent counties

* Gooding County - north * Jerome County - northeast * Cassia County - east * Elko County,

Nevada Nevada ( ; ) is a landlocked state in the Western United States. It borders Oregon to the northwest, Idaho to the northeast, California to the west, Arizona to the southeast, and Utah to the east. Nevada is the seventh-most extensive, th ...

- south/Pacific Time Border * Owyhee County - west * Elmore County - northwest

Major highways

* US 30 * US 93 * SH-50 * SH-74

National protected areas

* Hagerman Fossil Beds National Monument * Sawtooth National Forest (part)

Demographics

2010 census

As of the 2010 census, there were 77,230 people, 28,760 households, and 19,954 families living in the county. The population density was . There were 31,072 housing units at an average density of . The racial makeup of the county was 88.9% white, 1.2% Asian, 0.8% American Indian, 0.4% black or African American, 0.1% Pacific islander, 6.3% from other races, and 2.3% from two or more races. Those of Hispanic or Latino origin made up 13.7% of the population. In terms of ancestry, 20.2% were German, 14.5% were English, 10.8% were Irish, and 7.0% were American. Of the 28,760 households, 35.4% had children under the age of 18 living with them, 54.1% were married couples living together, 10.5% had a female householder with no husband present, 30.6% were non-families, and 24.3% of all households were made up of individuals. The average household size was 2.65 and the average family size was 3.16. The median age was 34.4 years. The median income for a household in the county was $42,455 and the median income for a family was $49,188. Males had a median income of $35,777 versus $26,257 for females. The per capita income for the county was $19,892. About 10.6% of families and 13.0% of the population were below the

poverty line The poverty threshold, poverty limit, poverty line, or breadline is the minimum level of income deemed adequate in a particular country. The poverty line is usually calculated by estimating the total cost of one year's worth of necessities for ...

, including 16.9% of those under age 18 and 10.7% of those age 65 or over.

2000 census

As of the 2000 census, there were 64,284 people, 23,853 households, and 16,959 families living in the county. The population density was . There were 25,595 housing units at an average density of . The racial makeup of the county was 92.47%

White White is the lightest color and is achromatic (having no chroma). It is the color of objects such as snow, chalk, and milk, and is the opposite of black. White objects fully (or almost fully) reflect and scatter all the visible wa ...

, 0.19%

Black Black is a color that results from the absence or complete absorption of visible light. It is an achromatic color, without chroma, like white and grey. It is often used symbolically or figuratively to represent darkness.Eva Heller, ''P ...

African American African Americans, also known as Black Americans and formerly also called Afro-Americans, are an Race and ethnicity in the United States, American racial and ethnic group that consists of Americans who have total or partial ancestry from an ...

, 0.71% Native American, 0.76% Asian, 0.08%

Pacific Islander Pacific Islanders, Pasifika, Pasefika, Pacificans, or rarely Pacificers are the peoples of the list of islands in the Pacific Ocean, Pacific Islands. As an ethnic group, ethnic/race (human categorization), racial term, it is used to describe th ...

, 3.77% from other races, and 2.02% from two or more races. 9.37% of the population were

Hispanic The term Hispanic () are people, Spanish culture, cultures, or countries related to Spain, the Spanish language, or broadly. In some contexts, Hispanic and Latino Americans, especially within the United States, "Hispanic" is used as an Ethnici ...

or Latino of any race. 17.9% were of German, 17.7% English, 10.9% American and 7.3% Irish ancestry. There were 23,853 households, out of which 34.70% had children under the age of 18 living with them, 58.00% were

married couples Marriage, also called matrimony or wedlock, is a culturally and often legally recognised union between people called spouses. It establishes rights and obligations between them, as well as between them and their children (if any), and b ...

living together, 9.20% had a female householder with no husband present, and 28.90% were non-families. 23.60% of all households were made up of individuals, and 10.40% had someone living alone who was 65 years of age or older. The average household size was 2.64 and the average family size was 3.13. In the county, the population was spread out, with 27.90% under the age of 18, 10.40% from 18 to 24, 26.00% from 25 to 44, 21.50% from 45 to 64, and 14.30% who were 65 years of age or older. The median age was 35 years. For every 100 females, there were 96.50 males. For every 100 females age 18 and over, there were 93.70 males. The median income for a household in the county was $34,506, and the median income for a family was $39,886. Males had a median income of $30,058 versus $20,825 for females. The

per capita income Per capita income (PCI) or average income measures the average income earned per person in a given area (city, region, country, etc.) in a specified year. In many countries, per capita income is determined using regular population surveys, such ...

for the county was $16,678. About 9.10% of families and 12.70% of the population were below the

, including 16.00% of those under age 18 and 9.30% of those age 65 or over.

Communities

Cities

* Buhl *

Castleford Castleford is a town within the City of Wakefield district, West Yorkshire, England. It had a population of 45,106 at a 2021 population estimate. Historic counties of England, Historically in the West Riding of Yorkshire, to the north of the t ...

* Filer * Hansen * Hollister * Kimberly * Murtaugh * Twin Falls

Unincorporated communities

Amsterdam Amsterdam ( , ; ; ) is the capital of the Netherlands, capital and Municipalities of the Netherlands, largest city of the Kingdom of the Netherlands. It has a population of 933,680 in June 2024 within the city proper, 1,457,018 in the City Re ...

* Artesian City * Caldron Linn *

Clover Clovers, also called trefoils, are plants of the genus ''Trifolium'' (), consisting of about 300 species of flowering plants in the legume family Fabaceae originating in Europe. The genus has a cosmopolitan distribution with the highest diversit ...

* Curry * Deep Creek * Fairview * Godwin * Knull * Peavey * Milner Dam (Extends into) Cassia County and Jerome County * Rock Creek * Rogerson

Politics

Twin Falls County leans heavily Republican; it has not voted for a Democratic presidential nominee since 1936, and even in the Democratic landslide of 1964

Barry Goldwater Barry Morris Goldwater (January 2, 1909 – May 29, 1998) was an American politician and major general in the United States Air Force, Air Force Reserve who served as a United States senator from 1953 to 1965 and 1969 to 1987, and was the Re ...

still carried Twin Falls by 20 percentage points.

Education

School districts include: * Bliss Joint School District 234 * Buhl Joint School District 412 * Cassia County Joint School District 151 * Castleford School District 417 * Filer School District 413 * Hagerman Joint School District 233 * Hansen School District 415 * Kimberly School District 414 * Murtaugh Joint School District 418 * Three Creek Joint Elementary School District 416 * Twin Falls School District 411 The county is in the catchment area, and the taxation zone, for College of Southern Idaho. - See area 1 in:

Notes

References

External links

County website

County Parcel Map
{{coord, 42.35, -114.66, display=title, type:adm2nd_region:US-ID_source:UScensus1990 Idaho counties 1907 establishments in Idaho Populated places established in 1907 Twin Falls, Idaho metropolitan area