Anna, IL has a population of 4,332 and is the 7,076th largest city in the United States. The population density is 1,219 per sq mi which is 448% higher than the Illinois average and 1246% higher than the national average. The median age in Anna is 41 which is approximately 9% higher than the Illinois average of 37. In Anna, 50% of the population over 15 years of age are married, 93% speak English and 6% speak Spanish. 76% of Anna residents were born in Illinois, 21% were born out of state, 0% were born outside of the United States and 2% were foreign born.