RANKING · 2020 CENSUS · 29 SHOWN OF 29

Most population gained, Utah counties · 2020

Utah counties that added 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

01Salt Lake County, UTUT1,220,916+155,583−10%

02Utah County, UTUT759,859+142,835+36%

03Davis County, UTUT381,227+56,200+10%

04Washington County, UTUT213,670+42,164+1%

05Weber County, UTUT278,174+30,987−19%

06Cache County, UTUT145,000+20,498−3%

07Tooele County, UTUT87,461+14,480+2%

08Wasatch County, UTUT38,514+11,258+120%

09Iron County, UTUT67,141+11,126−14%

10Box Elder County, UTUT65,320+7,691+23%

11Summit County, UTUT43,141+6,033−58%

12Uintah County, UTUT38,278+3,032+1%

13Morgan County, UTUT13,383+2,826+77%

14Juab County, UTUT13,567+1,540−36%

15Duchesne County, UTUT20,856+989−43%

16Sevier County, UTUT22,827+720−79%

17Sanpete County, UTUT31,453+615−91%

18Kane County, UTUT8,597+542−38%

19Millard County, UTUT14,057+472−56%

20Grand County, UTUT9,790+444−76%

21Beaver County, UTUT7,301+443−64%

22Rich County, UTUT2,687+246+4%

23Garfield County, UTUT5,256-89−112%

24Piute County, UTUT1,509-118−175%

25Daggett County, UTUT934-124−154%

26San Juan County, UTUT14,542-228−113%

27Wayne County, UTUT2,587-292−188%

28Carbon County, UTUT20,680-991−611%

29Emery County, UTUT10,177-1,151−318%

SHOWING 1–29 OF 29

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