Spring Valley, AZ has a population of 1,374 and is the 13,209th largest city in the United States. The population density is 130 per sq mi which is 126% higher than the Arizona average and 43% higher than the national average. The median age in Spring Valley is 53 which is approximately 43% higher than the Arizona average of 37. In Spring Valley, 61% of the population over 15 years of age are married, 98% speak English and 2% speak Spanish. 38% of Spring Valley residents were born in Arizona, 59% were born out of state, 0% were born outside of the United States and 3% were foreign born.