Tooele County, UT

Settlement & growth (pre-1960)

Before American settlement, the Tooele Valley was home to the Goshute and Ute peoples, who lived a semi-nomadic lifestyle centered on seasonal hunting and gathering around the Great Salt Lake and the Oquirrh Mountains. Spanish explorers and trappers passed through the region in the late 1700s and early 1800s, but no permanent European settlements were established until Mormon pioneers arrived in the 1850s. The first permanent settlement was Tooele City, founded in 1851 by Mormon colonists sent by Brigham Young to farm the valley and extract salt from the nearby desert. The town’s name derives from the Goshute word “tu-ee,” meaning “bulrush,” a plant common in the area’s wetlands.

The discovery of lead, silver, and gold in the Oquirrh Mountains in the 1860s and 1870s triggered the county’s first major population wave. Mining camps like Ophir (founded 1865) and Mercur (founded 1870) boomed as prospectors from across the United States and Europe—particularly Cornish, Irish, and German miners—poured in. Mercur, at its peak in the 1890s, was one of Utah’s most productive gold camps, with a population exceeding 5,000. The mining industry also drew a small but significant Chinese labor force, who worked as cooks, laundrymen, and railroad laborers, though they were largely segregated and left little permanent demographic footprint after the mines declined.

The arrival of the transcontinental railroad in 1869, with a major junction at Lake Point (now part of Tooele County), spurred a second wave of settlement. Railroad workers, many of them Irish and Italian immigrants, established small communities along the line, including Grantsville (founded 1853) and Stockton (founded 1863). Grantsville grew as an agricultural center, while Stockton became a supply hub for the mining districts. By 1900, the county’s population had reached roughly 7,000, with a mix of Mormon farmers, non-Mormon miners, and railroad laborers.

The early 20th century saw the rise of the U.S. Army’s Dugway Proving Ground (established 1942) and the Tooele Army Depot (established 1942), which brought a new wave of military and civilian workers to the county. These facilities, located near the town of Dugway and the city of Tooele, respectively, became major employers and stabilized the population after the mining booms faded. The post-World War II era saw modest suburban growth, as families moved to Tooele City and Grantsville for affordable housing and jobs at the depot and proving ground.

Modern era (post-1965)

The 1965 Hart-Cellar Act had a minimal direct impact on Tooele County, given its already low foreign-born population. The county’s demographic shifts since 1965 have been driven primarily by domestic migration and natural increase, rather than international immigration. The most significant change has been the growth of the Hispanic population, which rose from under 5% in 1990 to 14.2% today. This growth is concentrated in Tooele City and the southern part of the county, particularly around Stansbury Park, where many Hispanic families work in construction, warehousing, and service industries tied to the Wasatch Front’s expanding economy.

The 1990s and 2000s brought a wave of domestic migration from California and other Western states, as families sought lower housing costs and a more conservative, rural lifestyle. This “Mormon diaspora” from the Wasatch Front’s urban core (Salt Lake City, Provo) also contributed to growth, with many LDS families moving to Eagle Mountain (though technically in Utah County, it draws many Tooele County commuters) and Erda, a rapidly developing unincorporated area near Tooele City. The county’s population more than doubled between 1990 and 2020, from 36,000 to 76,648, driven largely by suburban expansion along the I-80 corridor.

East/Southeast Asian communities (0.5% of the population) and Indian subcontinent communities (0.2%) remain very small, with no distinct enclaves. These groups are primarily professionals and military personnel associated with Dugway Proving Ground and the Tooele Army Depot, and they are dispersed across the county rather than concentrated in any single town. The Black population (0.8%) is similarly small and scattered, with no historic Black neighborhood or community center.