Flordell Hills, MO has a population of 765 and is the 16,905th largest city in the United States. The population density is 6,896 per sq mi which is 7882% higher than the Missouri average and 7511% higher than the national average. The median age in Flordell Hills is 30 which is approximately 21% lower than the Missouri average of 38. In Flordell Hills, 36% of the population over 15 years of age are married, 100% speak English and 0% speak Spanish. 89% of Flordell Hills residents were born in Missouri, 11% were born out of state, 0% were born outside of the United States and 0% were foreign born.