RANKING · 2010 CENSUS · 29 SHOWN OF 29

Largest by population, Utah counties · 2010

The most populous Utah counties as of the 2010 population estimates. This list covers the 29 counties in Utah that qualify, ranked against each other statewide.

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SAME RANKING BYCities States Metros ZIP codes

RELATEDFastest growing Fastest shrinking Most population gained Most population lost Most densely populated Most sparsely populated

YEAR1990 2000 2010 2020 2025

RANKPLACESTATETOTAL POPULATIONVS 2000

01Salt Lake County, UTUT1,029,655+15%

02Utah County, UTUT516,564+40%

03Davis County, UTUT306,479+28%

04Weber County, UTUT231,236+18%

05Washington County, UTUT138,115+53%

06Cache County, UTUT112,656+23%

07Tooele County, UTUT58,218+43%

08Box Elder County, UTUT49,975+17%

09Iron County, UTUT46,163+37%

10Summit County, UTUT36,324+22%

11Uintah County, UTUT32,588+29%

12Sanpete County, UTUT27,822+22%

13Wasatch County, UTUT23,530+55%

14Carbon County, UTUT21,403+5%

15Sevier County, UTUT20,802+10%

16Duchesne County, UTUT18,607+29%

17San Juan County, UTUT14,746+2%

18Millard County, UTUT12,503+1%

19Emery County, UTUT10,976+1%

20Juab County, UTUT10,246+24%

21Morgan County, UTUT9,469+33%

22Grand County, UTUT9,225+9%

23Kane County, UTUT7,125+18%

24Beaver County, UTUT6,629+10%

25Garfield County, UTUT5,172+9%

26Wayne County, UTUT2,778+11%

27Rich County, UTUT2,264+15%

28Piute County, UTUT1,556+8%

29Daggett County, UTUT1,059+15%

SHOWING 1–29 OF 29

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UPDATED 2026-07-15 · DATA: US CENSUS BUREAU DECENNIAL CENSUS