Athens, IL has a population of 2,013 and is the 10,991st largest city in the United States. The population density is 1,197 per sq mi which is 425% higher than the Illinois average and 1221% higher than the national average. The median age in Athens is 36 which is approximately 5% lower than the Illinois average of 37. In Athens, 63% of the population over 15 years of age are married, 98% speak English and 1% speak Spanish. 86% of Athens residents were born in Illinois, 13% were born out of state, 0% were born outside of the United States and 1% were foreign born.