RANKING · 2020 CENSUS · 29 SHOWN OF 29

Fastest shrinking, Utah counties

Utah counties with the steepest population decline since the prior decennial census. 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 growing Most densely populated Most sparsely populated Best broadband access Worst broadband access

YEAR2000 2010 2020

RANKPLACESTATEPOPPOPULATION GROWTHVS 2000

01Daggett County, UTUT934-11.7%−135%

02Wayne County, UTUT2,587-10.5%−169%

03Emery County, UTUT10,177-10.5%−305%

04Piute County, UTUT1,509-7.6%−161%

05Carbon County, UTUT20,680-4.6%−583%

06Garfield County, UTUT5,256-1.7%−109%

07San Juan County, UTUT14,542-1.5%−111%

08Sanpete County, UTUT31,453+2.2%−94%

09Sevier County, UTUT22,827+3.5%−84%

10Millard County, UTUT14,057+3.8%−60%

11Grand County, UTUT9,790+4.8%−83%

12Duchesne County, UTUT20,856+5.3%−61%

13Beaver County, UTUT7,301+6.7%−74%

14Kane County, UTUT8,597+7.6%−55%

15Uintah County, UTUT38,278+9.3%−31%

16Rich County, UTUT2,687+10.9%−21%

17Weber County, UTUT278,174+13.4%−44%

18Juab County, UTUT13,567+15.0%−64%

19Salt Lake County, UTUT1,220,916+15.1%−36%

20Box Elder County, UTUT65,320+15.4%−10%

21Summit County, UTUT43,141+16.6%−82%

22Cache County, UTUT145,000+18.2%−40%

23Davis County, UTUT381,227+18.3%−32%

24Iron County, UTUT67,141+24.1%−61%

25Tooele County, UTUT87,461+24.9%−53%

26Utah County, UTUT759,859+27.7%−31%

27Morgan County, UTUT13,383+29.8%+3%

28Washington County, UTUT213,670+30.5%−65%

29Wasatch County, UTUT38,514+47.8%−6%

SHOWING 1–29 OF 29

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UPDATED 2026-06-02 · DATA: US CENSUS BUREAU ACS 5-YEAR ESTIMATES