West Valley City, UT has a population of 134,609 and is the 197th largest city in the United States. The population density is 3,796 per sq mi which is 11183% higher than the Utah average and 4089% higher than the national average. The median age in West Valley City is 30 which is approximately equal to the Utah average of 30. In West Valley City, 54% of the population over 15 years of age are married, 60% speak English and 31% speak Spanish. 56% of West Valley City residents were born in Utah, 20% were born out of state, 1% were born outside of the United States and 23% were foreign born.