Azusa, CA has a population of 48,498 and is the 849th largest city in the United States. The population density is 5,022 per sq mi which is 1862% higher than the California average and 5443% higher than the national average. The median age in Azusa is 29 which is approximately 19% lower than the California average of 36. In Azusa, 42% of the population over 15 years of age are married, 44% speak English and 47% speak Spanish. 60% of Azusa residents were born in California, 10% were born out of state, 1% were born outside of the United States and 29% were foreign born.