Admitted to the Union on January 4, 1896 as the 45th state. Utah became a territory in September 1850, with the census being taken in April and May 1851 with a census day of April 1, 1851.
- 1850 – 1940 federal censuses extant for all counties except for 1890.
| Beaver | Box Elder | Cache | Carbon |
| Daggett | Davis | Duchesne | Emery |
| Garfield | Grand | Iron | Juab |
| Kane | Millard | Morgan | Piute |
| Rich | Salt Lake | San Juan | Sanpete |
| Sevier | Summit | Tooele | Uintah |
| Utah | Wasatch | Washington | Wayne |
| Weber |