Data / Rankings / Population density / Counties in Utah

Counties in Utah by population density, 2025

Salt Lake County had the highest population density of 29 counties in 2025, at 626.3 inhabitants per km². Garfield County had the lowest, at 0.4 inhabitants per km². The median was 4.4 inhabitants per km² and the figure for Utah was 16.5 inhabitants per km². Source: the U.S. Census Bureau.

Highest626.3Salt Lake County
Lowest0.4Garfield County
Median4.429 counties
Utah16.5History

All counties, 2025

CSVChart (SVG)

Salt Lake CountySalt Lake County: 626.3 inhabitants per km²626.3Davis CountyDavis County: 453 inhabitants per km²453Weber CountyWeber County: 175.8 inhabitants per km²175.8Utah CountyUtah County: 146.4 inhabitants per km²146.4Cache CountyCache County: 48.1 inhabitants per km²48.1Washington CountyWashington County: 34 inhabitants per km²34Wasatch CountyWasatch County: 12.6 inhabitants per km²12.6Summit CountySummit County: 8.9 inhabitants per km²8.9Morgan CountyMorgan County: 8.5 inhabitants per km²8.5Iron CountyIron County: 7.9 inhabitants per km²7.9Sanpete CountySanpete County: 7.6 inhabitants per km²7.6Carbon CountyCarbon County: 5.4 inhabitants per km²5.4Tooele CountyTooele County: 4.8 inhabitants per km²4.8Sevier CountySevier County: 4.6 inhabitants per km²4.6Box Elder CountyBox Elder County: 4.4 inhabitants per km²4.4Uintah CountyUintah County: 3.3 inhabitants per km²3.3Duchesne CountyDuchesne County: 2.5 inhabitants per km²2.5Juab 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 km²0.8Millard CountyMillard County: 0.8 inhabitants per km²0.8Piute CountyPiute 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

RankCounties2025
inhabitants per km²		Change on 2024
1Salt Lake County626.3+0.3%
2Davis County453+0.7%
3Weber County175.8+0.7%
4Utah County146.4+1.9%
5Cache County48.1+0.2%
6Washington County34+2.5%
7Wasatch County12.6+1.8%
8Summit County8.9-0.3%
9Morgan County8.5+2.1%
10Iron County7.9+2.4%
11Sanpete County7.6+1.9%
12Carbon County5.4+0.4%
13Tooele County4.8+3.1%
14Sevier County4.6+1%
15Box Elder County4.4+2.1%
16Uintah County3.3+0.3%
17Duchesne County2.5+0.9%
18Juab County1.5+1.8%
19Beaver County1.1-0.8%
20Grand County1+0.9%
21Rich County1-1.9%
22Emery County0.9+0.5%
23Kane County0.8+1.2%
24Millard County0.8+1%
25Piute County0.8-2.5%
26San Juan County0.7+0.3%
27Daggett County0.5-1.9%
28Wayne County0.4-0.7%
29Garfield County0.4-1.3%

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 626.3 inhabitants per km² in 2025, according to the U.S. Census Bureau.

Which county has the lowest population density?

Garfield County, with 0.4 inhabitants per km² 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, 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