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Population of Counties in Utah (2024)

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2024 Population
Growth Since 2020
Area (mi²)
Density (/mi²)
Salt Lake County1,185,057-0.16%2911,574Salt Lake County location
Utah County735,65610.86%774367Utah County location
Davis County376,5273.51%1251,159Davis County location
Weber County274,3924.34%236449Weber County location
Washington County207,17413.82%93785Washington County location
Cache County144,6418.24%450124Cache County location
Tooele County84,14714.71%2.7K12Tooele County location
Iron County65,91414.21%1.3K20Iron County location
Box Elder County63,84510.18%2.2K11Box Elder County location
Summit County42,473-0.04%72223Summit County location
Uintah County38,3907.62%1.7K9Uintah County location
Wasatch County37,6917.52%45432Wasatch County location
Sanpete County30,8638.19%61419Sanpete County location
Sevier County22,6455.06%73712Sevier County location
Duchesne County20,8126.08%1.2K6Duchesne County location
Carbon County20,6780.93%57114Carbon County location
San Juan County14,310-1.45%3K2San Juan County location
Millard County13,5313.61%2.6K2Millard County location
Juab County13,46013.88%1.3K4Juab County location
Morgan County13,1636.31%23522Morgan County location
Emery County10,1953.53%1.7K2Emery County location
Grand County9,641-0.34%1.4K3Grand County location
Kane County8,64712.4%1.5K2Kane County location
Beaver County7,1490.93%1K3Beaver County location
Garfield County5,3705.23%2K1Garfield County location
Rich County2,6917.43%3973Rich County location
Wayne County2,5943.64%9501Wayne County location
Piute County1,60711.6%2932Piute County location
Daggett County9691.79%2691Daggett County location
showing: 29 rows

There are 29 counties in Utah. In 2019, Utah's most populous county is Salt Lake County, home to Salt Lake City, with a population of 1,135,649. This represents growth of 9.94% since the 2010 census. Salt Lake County is followed by Utah County (606,425), Davis County (347,637), Weber County (251,769), Washington County (165,662), and Cache County (124,438). These are the only Utah counties with a population of more than 75,000. Of these counties, Washington County has had the most impressive growth rate since the census at 19.70%. All of these counties have grown at a rate of more than 8%, however.

Utah Counties with Fewest Residents

The least populated county in Utah is Daggett County with 1,029 residents. The county's growth rate since the census is -4.46%. Other counties with a population of 5,000 or less include Piute County (1,420), Rich County (2,391), Wayne County (2,719), and Garfield County (5,078). All of these counties have experienced a population decline except Rich County, which has grown by 6.03%.

Utah Counties with Rapid Growth

The Utah county with the most impressive growth rate is Wasatch County, which has grown significantly by 35.79% to 32,106. Many Utah counties have experienced rapid growth, including Morgan County (24.70%), Washington County (19.70%), Utah County (16.63%), Tooele County (15.31%), and Summit County (12.62%). Piute County, with 1,420 residents, has experienced the greatest decline of 9.27% followed by Emergy County (-8.43%).

Lists of Counties in all States

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