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Uintah County
Quarry Visitor Center at Dinosaur National Monument.
Quarry Visitor Center at Dinosaur National Monument.
Map of Utah highlighting Uintah County
Location within the U.S. state of Utah
Map of the United States highlighting Utah
Utah's location within the U.S.
Country  United States
State  Utah
Founded February 18, 1880
Named for Ute Tribe
Seat Vernal
Largest city Vernal
 • Total 4,501 sq mi (11,660 km2)
 • Land 4,480 sq mi (11,600 km2)
 • Water 22 sq mi (60 km2)  0.5%
 • Total 35,620
 • Density 7.9138/sq mi (3.0555/km2)
Time zone UTC−7 (Mountain)
 • Summer (DST) UTC−6 (MDT)
Congressional district 1st

Uintah County ( yoo-IN-tə) is a county in the U.S. state of Utah. As of the 2010 United States Census the population was 32,588. Its county seat and largest city is Vernal. The county was named for the portion of the Ute Indian tribe that lived in the basin.

Uintah County is the largest natural gas producer in Utah, with 272 billion cubic feet produced in 2008.

The Vernal, UT Micropolitan Statistical Area includes all of Uintah County.


Archeologic evidence suggests that portions of the Uinta Basin have been inhabited by Archaic peoples and Fremont peoples. By the time of recorded history its inhabitants were the Ute people. The first known traverse by non-Indians was made by Fathers Dominguez and Escalante (1776), as they sought to establish a land route between California and Spanish America.

By the early nineteenth century, occasional fur trappers entered the Basin. In 1831-32 Antoine Robidoux, a French trapper licensed by the Mexican government, established a trading post near present-day Whiterocks. He abandoned the effort in 1844.

In 1847 the Great Salt Lake Valley, still a property of Mexico, was first colonized by Brigham Young and his followers. In 1861 Young dispatched an exploring party to the Uinta Basin; they reported that "that section of country lying between the Wasatch Mountains and the eastern boundary of the territory, and south of Green River country, was one vast contiguity of waste and measurably valueless." Young made no further effort to colonize the area.

In 1861 US President Abraham Lincoln created the Uintah and Ouray Indian Reservation, reserved for the use and habitation of Utah and Colorado Indians. In the 1880s the Uncompahgre Reservation was created in the southern portion of present-day Uintah County. Ashley Valley was not part of either Reservation, and by 1880 enough ranchers and farmers had settled there that the Territorial Legislature created Uintah County (most of which had previously been part of Wasatch County, with the county seat at Ashley (now an abandoned area some three miles (5 km) of present-day Vernal).

Gilsonite was discovered in 1888 at Bonanza, in central Uintah County. This was on Reservation land, but miners pressured the US government to remove some 7000 acres (11 square miles; 28 km²) for mining use. Mining and its associated activities (including relative lawlessness) rapidly boomed in that area.

The northern boundary of Uintah County originally extended to the north border of Utah. In 1918 the extreme northern portion (lying north of the Uinta Mountain watershed divide) was split off to form Daggett County, Utah.


According to the U.S. Census Bureau, the county has a total area of 4,501 square miles (11,660 km2), of which 4,480 square miles (11,600 km2) is land and 22 square miles (57 km2) (0.5%) is water.

Uintah County is centered in the Uintah Basin, which runs from western Colorado on the east to the Wasatch Mountains on the west, and from the Uinta Mountains on the north to the Roan Plateau on the south. This basin was formed by a prehistoric lake ("Uinta Lake") during the late Tertiary period.

The county's geography ranges from high mountain terrain (Uinta Mountains) to the fertile Ashley Valley (site of the county seat), to a rugged and desolate canyonland which includes the Dinosaur National Monument, to desolate and largely uninhabited hills in the south ("The Bookcliffs" to locals; officially Roan Plateau).


Adjacent counties

National and State protected areas


Historical population
Census Pop.
1880 799
1890 2,762 245.7%
1900 6,458 133.8%
1910 7,050 9.2%
1920 8,470 20.1%
1930 9,035 6.7%
1940 9,898 9.6%
1950 10,300 4.1%
1960 11,582 12.4%
1970 12,684 9.5%
1980 20,506 61.7%
1990 22,211 8.3%
2000 25,224 13.6%
2010 32,588 29.2%
2015 (est.) 37,928 16.4%
U.S. Decennial Census
1790–1960 1900–1990
1990–2000 2010–2014

As of the census of 2000, there were 25,224 people, 8,187 households, and 6,541 families residing in the county. The population density was 6 people per square mile (2/km²). There were 9,040 housing units at an average density of 2 per square mile (1/km²). The racial makeup of the county was 87.73% White, 0.11% Black or African American, 9.38% Native American, 0.22% Asian, 0.08% Pacific Islander, 1.05% from other races, and 1.43% from two or more races. 3.54% of the population was Hispanic or Latino of any race.

There were 8,187 households out of which 44.50% had children under the age of 18 living with them, 65.70% were married couples living together, 10.60% had a female householder with no husband present, and 20.10% were non-families. 17.20% of all households were made up of individuals and 7.30% had someone living alone who was 65 years of age or older. The average household size was 3.05 and the average family size was 3.45.

In the county, the population was spread out with 34.60% under the age of 18, 10.70% from 18 to 24, 25.40% from 25 to 44, 19.30% from 45 to 64, and 9.90% who were 65 years of age or older. The median age was 29 years. For every 100 females there were 99.30 males. For every 100 females age 18 and over, there were 95.90 males.

The median income for a household in the county was $34,518, and the median income for a family was $38,877. Males had a median income of $33,966 versus $21,199 for females. The per capita income for the county was $13,571. About 12% of families and 15% of the population were below the poverty line, including 18% of those under age 18 and 10% of those age 65 or over.



Located in southeastern Vernal, the Vernal Regional Airport provides daily scheduled air service to Denver, Colorado via Denver International Airport. Service is provided through United Express, operated by Skywest airlines. Fixed-Base Operator (FBO) service is available.


Special events

Games, Anime, and More (G.A.M.) is a biannual fan convention. It is a multi-genre convention having video games, card games, cartoons, costumes, tournaments, tabletop gaming, and similar activities. The G.A.M. Convention is held during March and August in Uintah County, Utah. In 2015 it was the first anime convention held in Vernal, Utah as well as the first gaming convention held there, making it the first convention of its type in Vernal. In 2016 it was held in Naples, Utah for the first time, making G.A.M. the first convention of its type in the city of Naples.




Census-designated places

Other unincorporated places


The extraction of natural resources including oil, natural gas, phosphate, and gilsonite constitute primary economic activity of Uintah County. There is some agriculture in Uintah County, primarily focusing on raising cattle and sheep, and cultivating alfalfa.

A significant portion of west Uintah County is taken up by the Uintah and Ouray Indian Reservation. The Ute Tribe's headquarters is in Fort Duchesne. Much of the rest of the county is land owned by the Ashley National Forest and the Bureau of Land Management. There is relatively little private land in the county.

Discovery of significant dinosaur and other pre-historic remains on the eastern edge of the county caused nationwide interest, which culminated in establishment of Dinosaur National Monument. In addition to the large Visitor Center at the Monument's Jensen site, a natural history museum, the Utah Field House of Natural History State Park Museum, showcasing some of the area's finds, was established in Vernal by the State of Utah.

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