Utah Population By County in 2021 (ACS-5Yrs)
Updated on February 28, 2025.
Based on the US Census ACS-5Yrs estimates, in 2021, the total population of Utah was 3.23M. Among all Utah counties, Salt Lake was the most populated county (1.17M), followed by Utah (648.27K), and then Davis (358.83K).
On the other hand, the least populated counties were: Daggett (564), Piute (1.81K), and Wayne (2.50K).
The chart and table below shows the population of each county and the percentage of Utah population in each county.
You can see similar information for other states and by state for the United States.
Related Topics: Utah ACS-5Yrs Estimates, 2021 Topic List.
Data Source: US Census - ACS 5-Year Estimates, 2021 Census.
Utah Population By County in 2021
Utah Population By County in 2021
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| County | Population | % of State Population |
|---|---|---|
| Beaver | 6962 | 0.22 |
| Box Elder | 56891 | 1.76 |
| Cache | 131703 | 4.08 |
| Carbon | 20208 | 0.63 |
| Daggett | 564 | 0.02 |
| Davis | 358831 | 11.11 |
| Duchesne | 19651 | 0.61 |
| Emery | 9839 | 0.30 |
| Garfield | 5061 | 0.16 |
| Grand | 9630 | 0.30 |
| Iron | 55839 | 1.73 |
| Juab | 11648 | 0.36 |
| Kane | 7635 | 0.24 |
| Millard | 12860 | 0.40 |
| Morgan | 12162 | 0.38 |
| Piute | 1809 | 0.06 |
| Rich | 2507 | 0.08 |
| Salt Lake | 1173331 | 36.31 |
| San Juan | 14610 | 0.45 |
| Sanpete | 28458 | 0.88 |
| Sevier | 21471 | 0.66 |
| Summit | 42156 | 1.31 |
| Tooele | 71340 | 2.21 |
| Uintah | 35488 | 1.10 |
| Utah | 648265 | 20.06 |
| Wasatch | 34028 | 1.05 |
| Washington | 176533 | 5.46 |
| Wayne | 2500 | 0.08 |
| Weber | 259390 | 8.03 |