Data / Rankings / Population density / Counties in Utah

Counties in Utah by population density

Salt Lake County had the highest population density of 29 counties in 2023, at 618.4 inhabitants per km². Garfield County had the lowest, at 0.4 inhabitants per km². The median was 4.2 inhabitants per km² and the figure for Utah was 16.1 inhabitants per km². Source: the U.S. Census Bureau.

Highest618.4Salt Lake County
Lowest0.4Garfield County
Median4.229 counties
Utah16.1History

All counties, 2023

CSVChart (SVG)

Salt Lake CountySalt Lake County: 618.4 inhabitants per km²618.4Davis CountyDavis County: 445.2 inhabitants per km²445.2Weber CountyWeber County: 172.3 inhabitants per km²172.3Utah CountyUtah County: 139.9 inhabitants per km²139.9Cache CountyCache County: 47.4 inhabitants per km²47.4Washington CountyWashington County: 32.3 inhabitants per km²32.3Wasatch CountyWasatch County: 12.2 inhabitants per km²12.2Summit CountySummit County: 8.9 inhabitants per km²8.9Morgan CountyMorgan County: 8.2 inhabitants per km²8.2Iron CountyIron County: 7.5 inhabitants per km²7.5Sanpete CountySanpete County: 7.4 inhabitants per km²7.4Carbon CountyCarbon County: 5.4 inhabitants per km²5.4Sevier CountySevier County: 4.5 inhabitants per km²4.5Tooele CountyTooele County: 4.5 inhabitants per km²4.5Box Elder CountyBox Elder County: 4.2 inhabitants per km²4.2Uintah CountyUintah County: 3.3 inhabitants per km²3.3Duchesne CountyDuchesne County: 2.4 inhabitants per km²2.4Juab CountyJuab County: 1.5 inhabitants per km²1.5Beaver CountyBeaver County: 1.1 inhabitants per km²1.1Grand CountyGrand County: 1 inhabitants per km²1Rich CountyRich County: 1 inhabitants per km²1Emery CountyEmery County: 0.9 inhabitants per km²0.9Kane CountyKane County: 0.8 inhabitants per km²0.8Piute CountyPiute County: 0.8 inhabitants per km²0.8Millard CountyMillard County: 0.8 inhabitants per km²0.8San Juan CountySan Juan County: 0.7 inhabitants per km²0.7Daggett CountyDaggett County: 0.5 inhabitants per km²0.5Wayne CountyWayne County: 0.4 inhabitants per km²0.4Garfield CountyGarfield County: 0.4 inhabitants per km²0.4
inhabitants per km². Source: Invokely calculation with data from U.S. Census Bureau. Retrieved 2026-10-09.

Full ranking

RankCounties2023
inhabitants per km²		Change on 2022
1Salt Lake County618.4+0.9%
2Davis County445.2+1.1%
3Weber County172.3+1.1%
4Utah County139.9+3%
5Cache County47.4+1.9%
6Washington County32.3+2.5%
7Wasatch County12.2+1.6%
8Summit County8.9-0.3%
9Morgan County8.2+1%
10Iron County7.5+2.8%
11Sanpete County7.4+2.7%
12Carbon County5.4+0.5%
13Sevier County4.5+1.4%
14Tooele County4.5+2.8%
15Box Elder County4.2+2.1%
16Uintah County3.3+1.9%
17Duchesne County2.4+1.6%
18Juab County1.5+3.6%
19Beaver County1.1-0.8%
20Grand County1-0.3%
21Rich County1+1.3%
22Emery County0.9+0.5%
23Kane County0.8+2.8%
24Piute County0.8+3.7%
25Millard County0.8+2%
26San Juan County0.7-0.4%
27Daggett County0.5-2.8%
28Wayne County0.4-0.5%
29Garfield County0.4+1%

Other periods

About this ranking

Resident population divided by land area in km². World Bank figures use mid-year population and land area excluding inland water.

United States: Census Bureau population estimates for 1 July divided by land area (water excluded) from the latest Census Gazetteer files. US tables often give people per square mile; multiply persons per km² by 2.59 to compare.

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. Population Estimates Program resident population on 1 July divided by land area from the latest Census Gazetteer files, persons per km². https://www2.census.gov/programs-surveys/popest/datasets/2020-2025/. Retrieved 2026-10-09.

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Questions

Which county has the highest population density?

Salt Lake County, with 618.4 inhabitants per km² in 2023, according to the U.S. Census Bureau.

Which county has the lowest population density?

Garfield County, with 0.4 inhabitants per km² in 2023.

Where does this ranking come from?

Every value comes from one source and one period, so the places are comparable: U.S. Census Bureau, Population Estimates Program resident population on 1 July divided by land area from the latest Census Gazetteer files, persons per km². Retrieved 2026-10-09.

Population density: other rankings

Counties in Utah: more rankings