RANKING · 2020 CENSUS · 29 SHOWN OF 29

Fastest growing, Utah counties · 2020

Utah counties ranked by population growth from the 2010 census to 2020. This list covers the 29 counties in Utah that qualify, ranked against each other statewide.

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SAME RANKING BYCities States Metros

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

YEAR2000 2010 2020 2025

RANKPLACESTATEPOPPOPULATION GROWTHVS 2000

01Wasatch County, UTUT38,514+47.8%−6%

02Washington County, UTUT213,670+30.5%−65%

03Morgan County, UTUT13,383+29.8%+3%

04Utah County, UTUT759,859+27.7%−31%

05Tooele County, UTUT87,461+24.9%−53%

06Iron County, UTUT67,141+24.1%−61%

07Davis County, UTUT381,227+18.3%−32%

08Cache County, UTUT145,000+18.2%−40%

09Summit County, UTUT43,141+16.6%−82%

10Box Elder County, UTUT65,320+15.4%−10%

11Salt Lake County, UTUT1,220,916+15.1%−36%

12Juab County, UTUT13,567+15.0%−64%

13Weber County, UTUT278,174+13.4%−44%

14Rich County, UTUT2,687+10.9%−21%

15Uintah County, UTUT38,278+9.3%−31%

16Kane County, UTUT8,597+7.6%−55%

17Beaver County, UTUT7,301+6.7%−74%

18Duchesne County, UTUT20,856+5.3%−61%

19Grand County, UTUT9,790+4.8%−83%

20Millard County, UTUT14,057+3.8%−60%

21Sevier County, UTUT22,827+3.5%−84%

22Sanpete County, UTUT31,453+2.2%−94%

23San Juan County, UTUT14,542-1.5%−111%

24Garfield County, UTUT5,256-1.7%−109%

25Carbon County, UTUT20,680-4.6%−583%

26Piute County, UTUT1,509-7.6%−161%

27Emery County, UTUT10,177-10.5%−305%

28Wayne County, UTUT2,587-10.5%−169%

29Daggett County, UTUT934-11.7%−135%

SHOWING 1–29 OF 29

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