PlainCities

Counties · Utah

Counties of Utah

Utah has 29 counties. Salt Lake County is the largest with 1,220,916 residents in 2025. 28 of the 29 gained residents between 2020 and 2025 by the Census Bureau's estimates.

What counties are in Utah?

Sorted by the 2025 population estimate; sort by any column.

Counties of Utah: 2025 estimate, change since 2020, ACS 2020-2024 5-year estimates
Salt Lake County1,220,916+3.0%24251$97,494$525,700
Utah County759,859+15.2%34156$100,671$538,700
Davis County381,227+5.1%1566$110,884$505,500
Weber County278,174+6.1%1858$90,005$426,700
Washington County213,670+18.5%1935$80,632$510,700
Cache County145,000+8.9%2428$81,665$444,400
Tooele County87,461+20.3%1117$106,587$431,600
Iron County67,141+17.2%1112$66,247$379,000
Box Elder County65,320+13.3%1912$84,550$403,600
Summit County43,141+1.9%1714$138,114$1,067,700
Wasatch County38,514+10.7%1010$117,608$787,300
Uintah County38,278+7.5%108$73,746$298,600
Sanpete County31,453+10.6%137$70,083$347,200
Sevier County22,827+6.1%125$74,884$311,200
Duchesne County20,856+6.4%74$78,445$283,700
Carbon County20,680+1.3%105$58,377$228,500
San Juan County14,542+0.2%144$64,481$224,200
Millard County14,057+8.3%133$73,639$284,700
Juab County13,567+15.2%62$101,786$425,400
Morgan County13,383+8.8%33$130,929$654,900
Emery County10,177+3.6%93$74,291$218,700
Grand County9,790+1.2%33$67,106$538,700
Kane County8,597+12.1%52$77,092$410,900
Beaver County7,301+3.2%32$79,360$283,700
Garfield County5,256+3.3%92$61,875$318,100
Rich County2,687+7.0%51$79,009$334,600
Wayne County2,587+4.0%71$76,607$411,800
Piute County1,509+4.5%41$48,393$264,800
Daggett County934−0.2%31$66,000$282,300

Source: PEP Vintage 2025 (CO-EST2025); American Community Survey 2020-2024 5-year estimates, U.S. Census Bureau (released January 2026) · Census population estimates

How these figures are made: methodology and release checks · reading a margin of error · every state · corrections