Utah Counties by Population (2025)

Top 5 Most Populous Counties

Utah flag Salt Lake County

1,184,301

Utah flag Utah County

752,138

Utah flag Davis County

379,847

Utah flag Weber County

276,858

Utah flag Washington County

211,896

29 Counties

County
2025 Pop. ↓
Area (mi²)
Density
Change (2020)
Salt Lake County1,184,3017531,573-0.23%
Utah County752,1382,00437513.34%
Davis County379,8473251,1694.42%
Weber County276,8586114535.27%
Washington County211,8962,4288716.42%
Cache County146,8891,1651269.92%
Tooele County86,2437,0401217.57%
Iron County67,6173,2962117.16%
Box Elder County65,0065,7811112.18%
Summit County42,1871,87123-0.71%
Uintah County39,0334,48399.42%
Wasatch County38,2381,177329.08%
Sanpete County31,4491,5902010.25%
Sevier County22,9461,910126.46%
Duchesne County21,1473,23677.78%
Carbon County20,7471,479141.27%
San Juan County14,2627,8242-1.78%
Juab County13,8973,392417.58%
Millard County13,6256,78524.33%
Morgan County13,326609227.62%
Emery County10,2464,46324.05%
Grand County9,5763,6733-1.01%
Kane County8,8693,994215.29%
Beaver County7,0652,5833-0.25%
Garfield County5,4265,18016.33%
Rich County2,7121,02938.26%
Wayne County2,5742,46112.84%
Piute County1,664758215.56%
Daggett County9466971-0.63%

Overview of Utah Counties

There are 29 counties in Utah.

Salt Lake County is the largest county in the state, with a population of 1,184,301. The most recent census shows that its population has decreased by 0.00% since the previous census.

A number of other Utah counties also boast relatively large populations for their state, though not able to match the density of Salt Lake County:

Utah Counties with the Fewest Residents

The smallest county in Utah is Daggett County, with a population of just 946. This total represents a decrease of 0.0% since the last census count was performed.

Other small counties include:

Utah Counties with Rapid Growth

Juab County, with its current population of 13,897, has shown the largest population growth, with an increase of 0.2% since the last census.

Utah County has also had relatively high population growth of 0.13% with 752,138 residents.

On the other hand, San Juan County has had the largest decrease in population, with its 14,262 current residents totalling 0.0% less than the previous census.

Sources

  1. US Census State Population Estimates - Most recent state estimates from the Census Bureau's Population Estimates Program
  2. US Census County Population Estimates - Most recent county estimates from the Census Bureau's Population Estimates Program
  3. American Community Survey (2009 - 2013)
  4. Census QuickFacts
  5. Historical Populations of States and Counties (1790 - 1990)