Flora, IL has a population of 4,940 and is the 6,536th largest city in the United States. The population density is 1,054 per sq mi which is 374% higher than the Illinois average and 1063% higher than the national average. The median age in Flora is 40 which is approximately 6% higher than the Illinois average of 37. In Flora, 51% of the population over 15 years of age are married, 99% speak English and 1% speak Spanish. 88% of Flora residents were born in Illinois, 12% were born out of state, 0% were born outside of the United States and 0% were foreign born.