Calwa, CA has a population of 1,378 and is the 13,186th largest city in the United States. The population density is 2,342 per sq mi which is 908% higher than the California average and 2485% higher than the national average. The median age in Calwa is 32 which is approximately 11% lower than the California average of 36. In Calwa, 37% of the population over 15 years of age are married, 43% speak English and 57% speak Spanish. 83% of Calwa residents were born in California, 4% were born out of state, 0% were born outside of the United States and 12% were foreign born.