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.