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 2022, at 612.8 inhabitants per km². Garfield County had the lowest, at 0.4 inhabitants per km². The median was 4.1 inhabitants per km² and the figure for Utah was 15.9 inhabitants per km². Source: the U.S. Census Bureau.

Highest612.8Salt Lake County
Lowest0.4Garfield County
Median4.129 counties
Utah15.9History

All counties, 2022

CSVChart (SVG)

Salt Lake CountySalt Lake County: 612.8 inhabitants per km²612.8Davis CountyDavis County: 440.3 inhabitants per km²440.3Weber CountyWeber County: 170.5 inhabitants per km²170.5Utah CountyUtah County: 135.8 inhabitants per km²135.8Cache CountyCache County: 46.6 inhabitants per km²46.6Washington CountyWashington County: 31.5 inhabitants per km²31.5Wasatch CountyWasatch County: 12 inhabitants per km²12Summit CountySummit County: 8.9 inhabitants per km²8.9Morgan CountyMorgan County: 8.1 inhabitants per km²8.1Iron CountyIron County: 7.3 inhabitants per km²7.3Sanpete CountySanpete County: 7.2 inhabitants per km²7.2Carbon CountyCarbon County: 5.4 inhabitants per km²5.4Sevier CountySevier County: 4.5 inhabitants per km²4.5Tooele CountyTooele County: 4.4 inhabitants per km²4.4Box Elder CountyBox Elder County: 4.1 inhabitants per km²4.1Uintah CountyUintah County: 3.2 inhabitants per km²3.2Duchesne CountyDuchesne County: 2.4 inhabitants per km²2.4Juab CountyJuab County: 1.4 inhabitants per km²1.4Beaver 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: 0.6 inhabitants per km²0.6Wayne 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

RankCounties2022
inhabitants per km²		Change on 2021
1Salt Lake County612.8+0.7%
2Davis County440.3+0.8%
3Weber County170.5+1.2%
4Utah County135.8+2.8%
5Cache County46.6+2.1%
6Washington County31.5+3.3%
7Wasatch County12+1.2%
8Summit County8.9-0.2%
9Morgan County8.1+1.5%
10Iron County7.3+3.4%
11Sanpete County7.2+2.3%
12Carbon County5.4+0.8%
13Sevier County4.5+0.8%
14Tooele County4.4+4.2%
15Box Elder County4.1+3.1%
16Uintah County3.2+2.5%
17Duchesne County2.4+1.8%
18Juab County1.4+2.9%
19Beaver County1.1+1.7%
20Grand County1+1.3%
21Rich County1+1.3%
22Emery County0.9+1.3%
23Kane County0.8+2.6%
24Piute County0.8+0.3%
25Millard County0.8+1.5%
26San Juan County0.7-0.7%
27Daggett County0.6+3.1%
28Wayne County0.4+2.7%
29Garfield County0.4+2.9%

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 612.8 inhabitants per km² in 2022, according to the U.S. Census Bureau.

Which county has the lowest population density?

Garfield County, with 0.4 inhabitants per km² in 2022.

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