Tooele ( /tuːɪlə/ too-il-ə or /tuːɛlə/ too-el-ə) is a city in Tooele County in the U.S. state of Utah. It is part of the Salt Lake City, Utah, Metropolitan Statistical Area. The population was 22,502 at the 2000 census, and 30,708 as of the 2009 estimates. It is the county seat of Tooele County. The city is well known for Tooele Army Depot, privately-owned waste-disposal facilities west of Tooele Valley, and TOCDF, a government-owned chemical weapons incinerator south of Tooele Valley.
According to the United States Census Bureau, the city has a total area of 21.2 square miles (54.8 km²), of which 21.1 square miles (54.8 km²) is land and 0.04 square miles (0.1 km²) (0.09%) is water.
Tooele is located on the western slopes of the Oquirrh Mountains in the Tooele Valley, the next valley west of the well-known Salt Lake Valley. Many popular camping and picnic areas surround the city.