Former Counties
There were ten counties in the Territory of Utah that were absorbed by other states or Utah counties.
| County | Established | Superseded | Etymology | Present location |
|---|---|---|---|---|
| Carson County | 1854 | 1861 | Named for the Carson River, a 150-mile (240 km) river in Nevada and California that originates from the Sierra Nevada Mountains | Nevada |
| Cedar County | 1856 | 1862 | Named for the numerous cedar trees growing in the area (which are actually juniper trees) | Utah County |
| Desert County | 1852 | 1862 | Named for the surrounding desert | Box Elder County, Tooele County and Nevada |
| Greasewood County | 1856 | 1862 | Named for the greasewood plant growing in the area | Box Elder County |
| Green River County | 1852 | 1872 | Named for the Green River, a 730-mile (1,170 km) tributary of the Colorado River that runs through Wyoming, Colorado and Utah | Cache, Weber, Morgan, Davis, Wasatch, Summit, Duchesne, Carbon, and Utah Counties, and Wyoming and Colorado |
| Humboldt County | 1856 | 1861 | Named for the Humboldt River, a 300-mile (480 km) river in Nevada and longest river in the Great Basin | Nevada |
| Malad County | 1856 | 1862 | Named for the Malad River, the name being French for "sickly" | Box Elder County |
| Rio Virgin County | 1869 | 1872 | Named for the Virgin River, a 160 miles (260 km) long tributary of the Colorado River located in southern Utah and Nevada | Washington County, Nevada and Arizona |
| St. Mary's County | 1856 | 1861 | Named after the Mary's River, which was later renamed to the Humboldt River | Nevada |
| Shambip County | 1856 | 1862 | Goshute Native American Tribe word for Rush Lake | Tooele County |
Read more about this topic: List Of Counties In Utah