Lake Arrowhead, CA has a population of 11,307 and is the 3,585th largest city in the United States. The population density is 638 per sq mi which is 174% higher than the California average and 604% higher than the national average. The median age in Lake Arrowhead is 41 which is approximately 13% higher than the California average of 36. In Lake Arrowhead, 63% of the population over 15 years of age are married, 82% speak English and 14% speak Spanish. 64% of Lake Arrowhead residents were born in California, 22% were born out of state, 1% were born outside of the United States and 13% were foreign born.