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 2020, at 608.9 inhabitants per km². Garfield County had the lowest, at 0.4 inhabitants per km². The median was 3.9 inhabitants per km² and the figure for Utah was 15.4 inhabitants per km². Source: the U.S. Census Bureau.

Highest608.9Salt Lake County
Lowest0.4Garfield County
Median3.929 counties
Utah15.4History

All counties, 2020

CSVChart (SVG)

Salt Lake CountySalt Lake County: 608.9 inhabitants per km²608.9Davis CountyDavis County: 432.3 inhabitants per km²432.3Weber CountyWeber County: 166.2 inhabitants per km²166.2Utah CountyUtah County: 127.8 inhabitants per km²127.8Cache CountyCache County: 44.3 inhabitants per km²44.3Washington CountyWashington County: 28.9 inhabitants per km²28.9Wasatch CountyWasatch County: 11.5 inhabitants per km²11.5Summit CountySummit County: 8.8 inhabitants per km²8.8Morgan CountyMorgan County: 7.8 inhabitants per km²7.8Sanpete CountySanpete County: 6.9 inhabitants per km²6.9Iron CountyIron County: 6.8 inhabitants per km²6.8Carbon CountyCarbon County: 5.3 inhabitants per km²5.3Sevier CountySevier County: 4.4 inhabitants per km²4.4Tooele CountyTooele County: 4 inhabitants per km²4Box Elder CountyBox Elder County: 3.9 inhabitants per km²3.9Uintah CountyUintah County: 3.1 inhabitants per km²3.1Duchesne CountyDuchesne County: 2.3 inhabitants per km²2.3Juab CountyJuab County: 1.3 inhabitants per km²1.3Beaver CountyBeaver County: 1.1 inhabitants per km²1.1Grand CountyGrand County: 1 inhabitants per km²1Rich CountyRich County: 0.9 inhabitants per km²0.9Emery CountyEmery County: 0.9 inhabitants per km²0.9Kane CountyKane County: 0.7 inhabitants per km²0.7Millard CountyMillard County: 0.7 inhabitants per km²0.7Piute CountyPiute County: 0.7 inhabitants per km²0.7San 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

RankCounties2020
inhabitants per km²
1Salt Lake County608.9
2Davis County432.3
3Weber County166.2
4Utah County127.8
5Cache County44.3
6Washington County28.9
7Wasatch County11.5
8Summit County8.8
9Morgan County7.8
10Sanpete County6.9
11Iron County6.8
12Carbon County5.3
13Sevier County4.4
14Tooele County4
15Box Elder County3.9
16Uintah County3.1
17Duchesne County2.3
18Juab County1.3
19Beaver County1.1
20Grand County1
21Rich County0.9
22Emery County0.9
23Kane County0.7
24Millard County0.7
25Piute County0.7
26San Juan County0.7
27Daggett County0.5
28Wayne County0.4
29Garfield County0.4

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 608.9 inhabitants per km² in 2020, according to the U.S. Census Bureau.

Which county has the lowest population density?

Garfield County, with 0.4 inhabitants per km² in 2020.

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