RANKING · 2025 ESTIMATES · 29 SHOWN OF 29

Most population lost, Utah counties

Utah counties that lost the most residents from the 2020 census to 2025, by raw count of people rather than percentage. This list covers the 29 counties in Utah that qualify, ranked against each other statewide. The median across all 29 is +1,260. Biggest climber in the top 100 since 2020: Summit County, UT, up 8 places to #11.

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SAME RANKING BYCities States Metros

YEAR2000 2010 2020 2025

RANKPLACESTATEPOPPOPULATION CHANGEVS 2000

01▲4Daggett County, UTUT934-1−100%

02▲2San Juan County, UTUT14,542+24−99%

03▲3Piute County, UTUT1,509+71−55%

04▼1Wayne County, UTUT2,587+101−70%

05▲5Grand County, UTUT9,790+121−94%

06▲1Garfield County, UTUT5,256+173−77%

07▲1Rich County, UTUT2,687+177−25%

08▲1Beaver County, UTUT7,301+229−82%

09▼7Carbon County, UTUT20,680+268+38%

10▼9Emery County, UTUT10,177+352−33%

11▲8Summit County, UTUT43,141+784−94%

12Kane County, UTUT8,597+930+6%

13▼2Millard County, UTUT14,057+1,082+1%

14▲3Morgan County, UTUT13,383+1,088−32%

15Duchesne County, UTUT20,856+1,260−27%

16▼2Sevier County, UTUT22,827+1,305−62%

17▼1Juab County, UTUT13,567+1,781−26%

18Uintah County, UTUT38,278+2,658−12%

19▼6Sanpete County, UTUT31,453+3,016−54%

20▲2Wasatch County, UTUT38,514+3,726−27%

21▼1Box Elder County, UTUT65,320+7,654+22%

22▼1Iron County, UTUT67,141+9,852−24%

23▲1Cache County, UTUT145,000+11,846−44%

24▼1Tooele County, UTUT87,461+14,763+4%

25Weber County, UTUT278,174+15,951−58%

26▲1Davis County, UTUT381,227+18,548−64%

27▼1Washington County, UTUT213,670+33,391−20%

28▲1Salt Lake County, UTUT1,220,916+35,678−79%

29▼1Utah County, UTUT759,859+100,460−4%

SHOWING 1–29 OF 29

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UPDATED 2026-09-11 · DATA: US CENSUS BUREAU POPULATION ESTIMATES