Spring Valley NV is a part of Las Vegas located in Clark County, NV. It lies about two miles (three km) west of the Las Vegas Strip and has a population of 178,495 at the 2010 census. Spring Valley was established in May 1981, but it had been developing since 1946, when it was created by U.S Route 91. This became known as “Las Vegas Boulevard South”. John T Jones, a trading post he established in the 19th century, was located one mile north of Sahara Avenue.