RANKING · 2010 CENSUS · 29 SHOWN OF 29

Fastest shrinking, Utah counties · 2010

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

01Millard County, UTUT14,057+0.8%−92%

02Emery County, UTUT10,177+1.1%−79%

03San Juan County, UTUT14,542+2.3%−84%

04Carbon County, UTUT20,680+4.8%+401%

05Piute County, UTUT1,509+8.4%−32%

06Grand County, UTUT9,790+8.7%−69%

07Garfield County, UTUT5,256+9.2%−51%

08Beaver County, UTUT7,301+10.4%−60%

09Sevier County, UTUT22,827+10.4%−53%

10Wayne County, UTUT2,587+10.7%−30%

11Salt Lake County, UTUT1,220,916+14.6%−38%

12Daggett County, UTUT934+15.0%−55%

13Rich County, UTUT2,687+15.5%+13%

14Box Elder County, UTUT65,320+16.9%−1%

15Weber County, UTUT278,174+17.7%−27%

16Kane County, UTUT8,597+17.8%+5%

17Summit County, UTUT43,141+22.2%−76%

18Sanpete County, UTUT31,453+22.2%−44%

19Cache County, UTUT145,000+23.3%−23%

20Juab County, UTUT13,567+24.4%−41%

21Davis County, UTUT381,227+28.2%+4%

22Uintah County, UTUT38,278+29.2%+115%

23Duchesne County, UTUT20,856+29.5%+116%

24Morgan County, UTUT13,383+32.8%+13%

25Iron County, UTUT67,141+36.7%−41%

26Utah County, UTUT759,859+40.2%+1%

27Tooele County, UTUT87,461+42.9%−19%

28Washington County, UTUT213,670+52.9%−39%

29Wasatch County, UTUT38,514+54.7%+8%

SHOWING 1–29 OF 29

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