RANKING · 2025 ESTIMATES · 29 SHOWN OF 29

Most densely populated, Utah counties

Utah counties ranked by residents per square mile (2025). This list covers the 29 counties in Utah that qualify, ranked against each other statewide. The median across all 29 is 11.

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SAME RANKING BYCities States Metros

RELATEDLargest by population Fastest growing Fastest shrinking Most population gained Most population lost Most sparsely populated

YEAR1990 2000 2010 2020 2025

RANKPLACESTATEPOPPOPULATION DENSITYVS 2000

01Salt Lake County, UTUT1,220,9161,622+36%

02Davis County, UTUT381,2271,174+60%

03Weber County, UTUT278,174455+42%

04Utah County, UTUT759,859379+106%

05Cache County, UTUT145,000124+59%

06Washington County, UTUT213,67088+136%

07Wasatch County, UTUT38,51433+153%

08Summit County, UTUT43,14123+45%

09Morgan County, UTUT13,38322+88%

10▲1Iron County, UTUT67,14120+99%

11▼1Sanpete County, UTUT31,45320+38%

12Carbon County, UTUT20,68014+1%

13▲1Tooele County, UTUT87,46112+115%

14▼1Sevier County, UTUT22,82712+21%

15Box Elder County, UTUT65,32011+53%

16Uintah County, UTUT38,2789+52%

17Duchesne County, UTUT20,8566+45%

18Juab County, UTUT13,5674+65%

19Beaver County, UTUT7,3013+22%

20Grand County, UTUT9,7903+15%

21Rich County, UTUT2,6873+37%

22Emery County, UTUT10,1772−6%

23Kane County, UTUT8,5972+42%

24Millard County, UTUT14,0572+13%

25Piute County, UTUT1,5092+5%

26San Juan County, UTUT14,5422+1%

27Daggett County, UTUT9341+1%

28Wayne County, UTUT2,5871+3%

29Garfield County, UTUT5,2561+11%

SHOWING 1–29 OF 29

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UPDATED 2026-09-11 · DATA: US CENSUS BUREAU POPULATION ESTIMATES