Reliez Valley, CA has a population of 3,595 and is the 7,927th largest city in the United States. The population density is 1,523 per sq mi which is 555% higher than the California average and 1581% higher than the national average. The median age in Reliez Valley is 52 which is approximately 44% higher than the California average of 36. In Reliez Valley, 71% of the population over 15 years of age are married, 86% speak English and 3% speak Spanish. 57% of Reliez Valley residents were born in California, 29% were born out of state, 2% were born outside of the United States and 13% were foreign born.