Utah Population By County in 2021
Updated on June 16, 2025.
Based on the US Census Vintage data estimates, in 2021, the population of Utah was 3,339,738. Among all Utah counties, Salt Lake had the highest population (1,186,513), followed by Utah (686,038), and Davis (367,529). Daggett was the least populated county (982).
Hover over or click on the counties in the map below to see the populations. The data can also be found in a table below. You can use the table to sort, filter, and explore the data further.
You can see similar information for other states and by state for the United States.
Related Topics: Utah Census Vintage Data Topic List.
Data Source: US Census Bureau (Vintage).
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Utah Population By County in 2021
Utah Population By County in 2021
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| County | Population | % of State Population |
|---|---|---|
| Beaver | 7216 | 0.22 |
| Box Elder | 59694 | 1.79 |
| Cache | 137470 | 4.12 |
| Carbon | 20355 | 0.61 |
| Daggett | 982 | 0.03 |
| Davis | 367529 | 11.01 |
| Duchesne | 19800 | 0.59 |
| Emery | 9967 | 0.30 |
| Garfield | 5122 | 0.15 |
| Grand | 9680 | 0.29 |
| Iron | 60520 | 1.81 |
| Juab | 12214 | 0.37 |
| Kane | 7981 | 0.24 |
| Millard | 13189 | 0.40 |
| Morgan | 12668 | 0.38 |
| Piute | 1491 | 0.05 |
| Rich | 2599 | 0.08 |
| Salt Lake | 1186513 | 35.53 |
| San Juan | 14494 | 0.43 |
| Sanpete | 29128 | 0.87 |
| Sevier | 21909 | 0.66 |
| Summit | 43182 | 1.29 |
| Tooele | 76777 | 2.30 |
| Uintah | 36235 | 1.09 |
| Utah | 686038 | 20.54 |
| Wasatch | 36257 | 1.09 |
| Washington | 191552 | 5.74 |
| Wayne | 2563 | 0.08 |
| Weber | 266613 | 7.98 |