List of counties in Utah

There are 29 counties in the U.S. state of Utah.

Counties of Utah
LocationState of Utah
Number29
Populations956 (Daggett) – 1,216,274 (Salt Lake)
Areas299 square miles (770 km2) (Davis) – 7,820 square miles (20,300 km2) (San Juan)
Government
  • County government
Subdivisions
  • Cities, towns, townships, unincorporated communities, Indian reservations, census-designated places

In 1849, the provisional State of Deseret established seven counties: Davis, Iron, Sanpete, Salt Lake, Tooele, Utah, and Weber. After the Territory of Utah was created in 1851, the first territorial legislature (1851–1852) acknowledged those seven and created three more: Juab, Millard, and Washington. Over a 40-year period (1854–1894), the Utah Territorial Legislature established most of the counties that exist today. In the early 20th century, after Utah had become a state, the final two counties were created: Duchesne by gubernatorial proclamation (1913) and Daggett by popular vote (1917). Present-day Duchesne County encompassed an Indian reservation that was created in 1861. The reservation was opened to homesteaders in 1905 and the county was created in 1913. Due to dangerous roads, mountainous terrain, and bad weather preventing travel via a direct route, 19th-century residents in present-day Daggett County had to travel 400 to 800 miles (640 to 1,290 km) on both stage and rail to conduct business in Vernal, the county seat for Uintah County a mere 50 miles (80 km) away. In 1917, all Uintah County residents voted to create Daggett County.

Based on 2024 United States Census data, the population of Utah was 3,503,613. Just under 75% of Utah's population is concentrated along four Wasatch Front counties: Salt Lake, Utah, Davis, and Weber. Salt Lake County was the largest county in the state with a population of 1,216,274, followed by Utah County with 747,234, Davis County with 378,470 and Weber County with 276,118. Daggett County was the least populated with 956 people. The largest county in land area is San Juan County with 7,821 square miles (20,260 km2) and Davis County is the smallest with 304 square miles (790 km2).

The Federal Information Processing Standard (FIPS) code, which is used by the United States government to uniquely identify states and counties, is provided with each county. Utah's FIPS code is 49, which when combined with any county code would be written as 49XXX. In the FIPS code column in the table below, each FIPS code links to the most current census data for that county.

The Utah Code (Title 17, Chapter 50, Part 5) divides the counties into six classes by population:

  • First class: Population of 1,000,000 or more. Only one county - Salt Lake - is first class.
  • Second class: Population between 175,000 and 1,000,000. Four counties.
  • Third class: Population between 40,000 and 175,000. Five counties.
  • Fourth class: Population between 11,000 and 40,000. Ten counties.
  • Fifth class: Population between 4,000 and 11,000. Five counties.
  • Sixth class: Population below 4,000. Four counties.

The county classes, for example, are used in the Utah legislature in crafting of legislation to distinguish between more urban and rural areas, such as important yet subtle distinctions in how revenue can be distributed. Usually, a bill intended to benefit rural counties would target the counties of the fourth, fifth and sixth class.

Under Utah Code (Title 17, Chapter 52a, Part 2), Utah counties are permitted to choose one of four forms of county government: a three-member full-time commission; a five or seven member expanded commission; a three to nine member (odd-numbered) part-time council with a full-time elected county mayor or a three to nine member (odd-numbered) part-time council with a full-time manager appointed by the council. 23 out of 29 counties are ruled by the standard three-member commission. Of the other six, Cache County was the first change in 1988 to a seven-member council with an elected mayor. Grand County adopted a seven-member council with appointed manager in 1992, followed by Morgan County in 1999 and Wasatch County in 2003. In 1998, Salt Lake County residents approved adopting a nine-member council with elected mayor that began work in 2001. Summit County adopted a five-member council with an appointed manager in 2006.

Counties

State of Deseret counties

  • Great Salt Lake County – original county created January 31, 1850
  • Iron County – original county created January 31, 1850
  • Sanpete County – original county created January 31, 1850
  • Tuilla County – original county created January 31, 1850
  • Utah County – original county created January 31, 1850
  • Weber County – original county created January 31, 1850
  • Davis County – created October 5, 1850, from portions of Great Salt Lake County and Weber County

County name changes

  • Tuilla County, Deseret created January 31, 1850, re-created as Tooele County, Utah Territory on March 3, 1852.
  • Great Salt Lake County, Utah Territory created March 3, 1852, name changed to Salt Lake County, Utah Territory on January 29, 1868
  • Richland County, Utah Territory created January 16, 1854, name changed to Rich County, Utah Territory on January 29, 1868

Former counties

There were ten counties in the Territory of Utah that were absorbed by other states or other Utah counties.

County Established Superseded Etymology Present location
Carson County January 17, 1854 March 2, 1861 Named for Kit Carson, an American frontiersman Nevada
Cedar County January 5, 1856 January 17, 1862 Named for the numerous cedar trees growing in the area (which are actually juniper trees) Utah County
Desert County March 3, 1852 January 17, 1862 Named for the surrounding desert Box Elder County, Tooele County and Nevada
Greasewood County January 5, 1856 January 17, 1862 Named for the greasewood plant growing in the area Box Elder County
Green River County March 3, 1852 February 16, 1872 Named for the Green River, a 730-mile (1,170 km) tributary of the Colorado River that runs through Wyoming, Colorado and Utah Cache, Weber, Morgan, Davis, Wasatch, Summit, Duchesne, Carbon, and Utah Counties, and Wyoming and Colorado
Humboldt County January 5, 1856 March 2, 1861 Named for the Humboldt River, a 300-mile (480 km) river in Nevada and longest river in the Great Basin Nevada
Malad County January 5, 1856 January 17, 1862 Named for the Malad River, the name being French for "sickly" Box Elder County
Rio Virgen County February 18, 1869 February 16, 1872 Named for the Virgin River (el Rio de la Virgen), a 160-mile-long (260 km) tributary of the Colorado River located in southern Utah and Nevada Washington County, Nevada and Arizona
St. Mary's County January 5, 1856 January 17, 1862 Named after the Mary's River, which was later renamed to the Humboldt River Nevada
Shambip County January 12, 1856 January 17, 1862 Goshute Native American Tribe word for Rush Lake Tooele County

Bibliography

  • Van Cott, John W. (1990). Utah Place Names. Salt Lake City: University of Utah Press. ISBN 978-0-87480-345-7.

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