| Rank | County | Population Density |
|---|---|---|
| 1 | Salt Lake County, Utah | 1,387.1 |
| 2 | Davis County, Utah | 1,025.8 |
| 3 | Weber County, Utah | 401.4 |
| 4 | Utah County, Utah | 257.8 |
| 5 | Cache County, Utah | 96.7 |
| 6 | Washington County, Utah | 56.9 |
| 7 | Wasatch County, Utah | 20 |
| 8 | Summit County, Utah | 19.4 |
| 9 | Sanpete County, Utah | 17.5 |
| 10 | Morgan County, Utah | 15.5 |
| 11 | Carbon County, Utah | 14.5 |
| 12 | Iron County, Utah | 14 |
| 13 | Sevier County, Utah | 10.9 |
| 14 | Box Elder County, Utah | 8.7 |
| 15 | Tooele County, Utah | 8.4 |
| 16 | Uintah County, Utah | 7.3 |
| 17 | Duchesne County, Utah | 5.7 |
| 18 | Juab County, Utah | 3 |
| 19 | Beaver County, Utah | 2.6 |
| 20 | Grand County, Utah | 2.5 |
| 21 | Emery County, Utah | 2.5 |
| 22 | Rich County, Utah | 2.2 |
| 23 | Piute County, Utah | 2.1 |
| 24 | San Juan County, Utah | 1.9 |
| 25 | Millard County, Utah | 1.9 |
| 26 | Kane County, Utah | 1.8 |
| 27 | Daggett County, Utah | 1.5 |
| 28 | Wayne County, Utah | 1.1 |
| 29 | Garfield County, Utah | 1 |
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