Joshua Tree, CA has a population of 6,943 and is the 5,210th largest city in the United States. The population density is 193 per sq mi which is 17% lower than the California average and 113% higher than the national average. The median age in Joshua Tree is 41 which is approximately 13% higher than the California average of 36. In Joshua Tree, 53% of the population over 15 years of age are married, 87% speak English and 9% speak Spanish. 59% of Joshua Tree residents were born in California, 30% were born out of state, 0% were born outside of the United States and 11% were foreign born.