Bostonia, CA has a population of 16,295 and is the 2,622nd largest city in the United States. The population density is 8,440 per sq mi which is 3532% higher than the California average and 9216% higher than the national average. The median age in Bostonia is 34 which is approximately 7% lower than the California average of 36. In Bostonia, 50% of the population over 15 years of age are married, 62% speak English and 27% speak Spanish. 58% of Bostonia residents were born in California, 20% were born out of state, 1% were born outside of the United States and 21% were foreign born.