Data / Rankings / Population / Counties in Utah

Counties in Utah by population, 2025

Salt Lake County had the highest population of 29 counties in 2025, at 1.22 million. Daggett County had the lowest, at 934. The median was 20,856 and the figure for Utah was 3.54 million. Source: the U.S. Census Bureau.

Highest1,220,916Salt Lake County
Lowest934Daggett County
Median20,85629 counties
Utah3,538,904History

All counties, 2025

CSVChart (SVG)

Salt Lake CountySalt Lake County: 1,220,916 persons1,220,916Utah CountyUtah County: 759,859 persons759,859Davis CountyDavis County: 381,227 persons381,227Weber CountyWeber County: 278,174 persons278,174Washington CountyWashington County: 213,670 persons213,670Cache CountyCache County: 145,000 persons145,000Tooele CountyTooele County: 87,461 persons87,461Iron CountyIron County: 67,141 persons67,141Box Elder CountyBox Elder County: 65,320 persons65,320Summit CountySummit County: 43,141 persons43,141Wasatch CountyWasatch County: 38,514 persons38,514Uintah CountyUintah County: 38,278 persons38,278Sanpete CountySanpete County: 31,453 persons31,453Sevier CountySevier County: 22,827 persons22,827Duchesne CountyDuchesne County: 20,856 persons20,856Carbon CountyCarbon County: 20,680 persons20,680San Juan CountySan Juan County: 14,542 persons14,542Millard CountyMillard County: 14,057 persons14,057Juab CountyJuab County: 13,567 persons13,567Morgan CountyMorgan County: 13,383 persons13,383Emery CountyEmery County: 10,177 persons10,177Grand CountyGrand County: 9,790 persons9,790Kane CountyKane County: 8,597 persons8,597Beaver CountyBeaver County: 7,301 persons7,301Garfield CountyGarfield County: 5,256 persons5,256Rich CountyRich County: 2,687 persons2,687Wayne CountyWayne County: 2,587 persons2,587Piute CountyPiute County: 1,509 persons1,509Daggett CountyDaggett County: 934 persons934
persons. Source: U.S. Census Bureau. Retrieved 2026-10-08.

Full ranking

RankCounties2025
persons		Change on 2024
1Salt Lake County1,220,916+0.3%
2Utah County759,859+1.9%
3Davis County381,227+0.7%
4Weber County278,174+0.7%
5Washington County213,670+2.5%
6Cache County145,000+0.2%
7Tooele County87,461+3.1%
8Iron County67,141+2.4%
9Box Elder County65,320+2.1%
10Summit County43,141-0.3%
11Wasatch County38,514+1.8%
12Uintah County38,278+0.3%
13Sanpete County31,453+1.9%
14Sevier County22,827+1%
15Duchesne County20,856+0.9%
16Carbon County20,680+0.4%
17San Juan County14,542+0.3%
18Millard County14,057+1%
19Juab County13,567+1.8%
20Morgan County13,383+2.1%
21Emery County10,177+0.3%
22Grand County9,790+0.9%
23Kane County8,597+1.2%
24Beaver County7,301-0.8%
25Garfield County5,256-1.2%
26Rich County2,687-1.9%
27Wayne County2,587-0.8%
28Piute County1,509-2.5%
29Daggett County934-1.9%

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 1.22 million in 2025, according to the U.S. Census Bureau.

Which county has the lowest population?

Daggett County, with 934 in 2025.

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