Macon, IL has a population of 1,204 and is the 14,010th largest city in the United States. The population density is 844 per sq mi which is 280% higher than the Illinois average and 832% higher than the national average. The median age in Macon is 37 which is approximately 1% lower than the Illinois average of 37. In Macon, 58% of the population over 15 years of age are married, 99% speak English and 0% speak Spanish. 88% of Macon residents were born in Illinois, 12% were born out of state, 0% were born outside of the United States and 0% were foreign born.