RANKING · 2020 CENSUS · 29 SHOWN OF 29

Most population lost, Utah counties · 2020

Utah counties that lost the most residents from the 2010 census to 2020, by raw count of people rather than percentage. This list covers the 29 counties in Utah that qualify, ranked against each other statewide.

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SAME RANKING BYCities States Metros

YEAR2000 2010 2020 2025

RANKPLACESTATEPOPPOPULATION CHANGEVS 2000

01Emery County, UTUT10,177-1,151−318%

02Carbon County, UTUT20,680-991−611%

03Wayne County, UTUT2,587-292−188%

04San Juan County, UTUT14,542-228−113%

05Daggett County, UTUT934-124−154%

06Piute County, UTUT1,509-118−175%

07Garfield County, UTUT5,256-89−112%

08Rich County, UTUT2,687+246+4%

09Beaver County, UTUT7,301+443−64%

10Grand County, UTUT9,790+444−76%

11Millard County, UTUT14,057+472−56%

12Kane County, UTUT8,597+542−38%

13Sanpete County, UTUT31,453+615−91%

14Sevier County, UTUT22,827+720−79%

15Duchesne County, UTUT20,856+989−43%

16Juab County, UTUT13,567+1,540−36%

17Morgan County, UTUT13,383+2,826+77%

18Uintah County, UTUT38,278+3,032+1%

19Summit County, UTUT43,141+6,033−58%

20Box Elder County, UTUT65,320+7,691+23%

21Iron County, UTUT67,141+11,126−14%

22Wasatch County, UTUT38,514+11,258+120%

23Tooele County, UTUT87,461+14,480+2%

24Cache County, UTUT145,000+20,498−3%

25Weber County, UTUT278,174+30,987−19%

26Washington County, UTUT213,670+42,164+1%

27Davis County, UTUT381,227+56,200+10%

28Utah County, UTUT759,859+142,835+36%

29Salt Lake County, UTUT1,220,916+155,583−10%

SHOWING 1–29 OF 29

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