Rancho Mirage, CA has a population of 17,876 and is the 2,423rd largest city in the United States. The population density is 719 per sq mi which is 209% higher than the California average and 694% higher than the national average. The median age in Rancho Mirage is 66 which is approximately 83% higher than the California average of 36. In Rancho Mirage, 68% of the population over 15 years of age are married, 86% speak English and 6% speak Spanish. 34% of Rancho Mirage residents were born in California, 51% were born out of state, 1% were born outside of the United States and 14% were foreign born.