Data / Rankings / Population / Counties in Utah

Counties in Utah by population

Salt Lake County had the highest population of 29 counties in 2021, at 1.19 million. Daggett County had the lowest, at 983. The median was 20,361 and the figure for Utah was 3.34 million. Source: the U.S. Census Bureau.

Highest1,186,648Salt Lake County
Lowest983Daggett County
Median20,36129 counties
Utah3,339,874History

All counties, 2021

CSVChart (SVG)

Salt Lake CountySalt Lake County: 1,186,648 persons1,186,648Utah CountyUtah County: 686,039 persons686,039Davis CountyDavis County: 367,590 persons367,590Weber CountyWeber County: 266,600 persons266,600Washington CountyWashington County: 191,519 persons191,519Cache CountyCache County: 137,495 persons137,495Tooele CountyTooele County: 76,782 persons76,782Iron CountyIron County: 60,514 persons60,514Box Elder CountyBox Elder County: 59,686 persons59,686Summit CountySummit County: 43,184 persons43,184Wasatch CountyWasatch County: 36,242 persons36,242Uintah CountyUintah County: 36,235 persons36,235Sanpete CountySanpete County: 29,104 persons29,104Sevier CountySevier County: 21,898 persons21,898Carbon CountyCarbon County: 20,361 persons20,361Duchesne CountyDuchesne County: 19,798 persons19,798San Juan CountySan Juan County: 14,489 persons14,489Millard CountyMillard County: 13,200 persons13,200Morgan CountyMorgan County: 12,666 persons12,666Juab CountyJuab County: 12,210 persons12,210Emery CountyEmery County: 9,962 persons9,962Grand CountyGrand County: 9,686 persons9,686Kane CountyKane County: 7,992 persons7,992Beaver CountyBeaver County: 7,213 persons7,213Garfield CountyGarfield County: 5,125 persons5,125Rich CountyRich County: 2,598 persons2,598Wayne CountyWayne County: 2,560 persons2,560Piute CountyPiute County: 1,495 persons1,495Daggett CountyDaggett County: 983 persons983
persons. Source: U.S. Census Bureau. Retrieved 2026-10-08.

Full ranking

RankCounties2021
persons		Change on 2020
1Salt Lake County1,186,648-0%
2Utah County686,039+3.4%
3Davis County367,590+1.1%
4Weber County266,600+1.4%
5Washington County191,519+5.2%
6Cache County137,495+2.9%
7Tooele County76,782+4.7%
8Iron County60,514+4.9%
9Box Elder County59,686+3%
10Summit County43,184+1.7%
11Wasatch County36,242+3.4%
12Uintah County36,235+1.6%
13Sanpete County29,104+2%
14Sevier County21,898+1.6%
15Carbon County20,361-0.6%
16Duchesne County19,798+0.9%
17San Juan County14,489-0.2%
18Millard County13,200+1.1%
19Morgan County12,666+2.3%
20Juab County12,210+3.3%
21Emery County9,962+1.2%
22Grand County9,6860%
23Kane County7,992+3.8%
24Beaver County7,213+1.7%
25Garfield County5,125+0.4%
26Rich County2,598+3.8%
27Wayne County2,560+2.2%
28Piute County1,495+3.8%
29Daggett County983+3.4%

Other periods

About this ranking

Resident population. Spain and the EU: 1 January, with Spanish figures from the official municipal register (Padrón). United States: Census Bureau population estimates for 1 July. Other countries and the World: World Bank mid-year estimates, which count all residents regardless of legal status or citizenship.

For Denmark, Statistics Denmark counts the registered resident population on 1 January. Greenland and the Faroe Islands are excluded. The annual series selects the first-quarter reference date from FOLK1A. The World Bank series exists for every country, so use it (through compare) to rank countries on one basis.

Every value in the ranking comes from the same publisher and the same period, so the counties are compared on one definition. Equal values share a rank.

How to cite

U.S. Census Bureau. Annual estimates of the resident population for the United States, states and counties, 1 July (Population Estimates Program). https://www2.census.gov/programs-surveys/popest/datasets/2020-2025/. Retrieved 2026-10-08.

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Questions

Which county has the highest population?

Salt Lake County, with 1.19 million in 2021, according to the U.S. Census Bureau.

Which county has the lowest population?

Daggett County, with 983 in 2021.

Where does this ranking come from?

Every value comes from one source and one period, so the places are comparable: U.S. Census Bureau, Annual estimates of the resident population for the United States, states and counties, 1 July (Population Estimates Program). Retrieved 2026-10-08.

Population: other rankings

Counties in Utah: more rankings