Bellflower, MO has a population of 354 and is the 21,534th largest city in the United States. The population density is 633 per sq mi which is 633% higher than the Missouri average and 599% higher than the national average. The median age in Bellflower is 39 which is approximately 3% higher than the Missouri average of 38. In Bellflower, 63% of the population over 15 years of age are married, 100% speak English and 0% speak Spanish. 77% of Bellflower residents were born in Missouri, 21% were born out of state, 1% were born outside of the United States and 0% were foreign born.