Bellflower, CA has a population of 77,687 and is the 453rd largest city in the United States. The population density is 12,698 per sq mi which is 5364% higher than the California average and 13916% higher than the national average. The median age in Bellflower is 33 which is approximately 8% lower than the California average of 36. In Bellflower, 49% of the population over 15 years of age are married, 45% speak English and 42% speak Spanish. 59% of Bellflower residents were born in California, 9% were born out of state, 1% were born outside of the United States and 31% were foreign born.