Running Springs, CA has a population of 4,624 and is the 6,806th largest city in the United States. The population density is 1,100 per sq mi which is 373% higher than the California average and 1114% higher than the national average. The median age in Running Springs is 42 which is approximately 16% higher than the California average of 36. In Running Springs, 59% of the population over 15 years of age are married, 95% speak English and 3% speak Spanish. 69% of Running Springs residents were born in California, 27% were born out of state, 1% were born outside of the United States and 4% were foreign born.