RANKING · 1990 CENSUS · 29 SHOWN OF 29

Largest by population, Utah counties · 1990

The most populous Utah counties as of the 1990 population estimates. This list covers the 29 counties in Utah that qualify, ranked against each other statewide. The median across all 29 is 12,645.

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SAME RANKING BYCities States Metros ZIP codes

RELATEDFastest growing Fastest shrinking Most population gained Most population lost Most densely populated Most sparsely populated

YEAR1990 2000 2010 2020 2025

RANKPLACESTATETOTAL POPULATIONVS –

01Salt Lake County, UTUT725,956–

02Utah County, UTUT263,590–

03Davis County, UTUT187,941–

04Weber County, UTUT158,330–

05Cache County, UTUT70,183–

06Washington County, UTUT48,560–

07Box Elder County, UTUT36,485–

08Tooele County, UTUT26,601–

09Uintah County, UTUT22,211–

10Iron County, UTUT20,789–

11Carbon County, UTUT20,228–

12Sanpete County, UTUT16,259–

13Summit County, UTUT15,518–

14Sevier County, UTUT15,431–

15Duchesne County, UTUT12,645–

16San Juan County, UTUT12,621–

17Millard County, UTUT11,333–

18Emery County, UTUT10,332–

19Wasatch County, UTUT10,089–

20Grand County, UTUT6,620–

21Juab County, UTUT5,817–

22Morgan County, UTUT5,528–

23Kane County, UTUT5,169–

24Beaver County, UTUT4,765–

25Garfield County, UTUT3,980–

26Wayne County, UTUT2,177–

27Rich County, UTUT1,725–

28Piute County, UTUT1,277–

29Daggett County, UTUT690–

SHOWING 1–29 OF 29

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UPDATED 2026-09-11 · DATA: US CENSUS BUREAU DECENNIAL CENSUS