West Valley City is a city in Salt Lake County and a suburb of Salt Lake City in the U.S. state of Utah. The population was 129,480 at the 2010 census, making it the second-largest city in Utah. The city incorporated in 1980 from a large, quickly growing unincorporated area, which was variously known as Granger, Hunter, Chesterfield, and Redwood. It is home to the Maverik Center and USANA Amphitheater.
There were 38,535 households out of which 47.1% had children under the age of 18 living with them, 61.3% were married couples living together, 13.2% had a female householder with no husband present, and 19.6% were non-families. 14.7% of all households were made up of individuals and 3.9% had someone living alone who was 65 years of age or older. The average household size was 3.36 and the average family size was 3.71.
In the city the population was spread out with 33.7% under the age of 18, 12.9% from 18 to 24, 30.7% from 25 to 44, 17.4% from 45 to 64, and 5.4% who were 65 years of age or older. The median age was 27 years. For every 100 females there were 102.3 males. For every 100 females age 18 and over, there were 100.5 males.
The median income for a household in the city was $45,773, and the median income for a family was $48,593. Males had a median income of $32,116 versus $22,693 for females. The per capita income for the city was $15,031. About 6.7% of families and 8.7% of the population were below the poverty line, including 11.0% of those under age 18 and 3.5% of those age 65 or over.