Milledgeville, IL has a population of 1,052 and is the 14,840th largest city in the United States. The population density is 1,525 per sq mi which is 586% higher than the Illinois average and 1583% higher than the national average. The median age in Milledgeville is 39 which is approximately 5% higher than the Illinois average of 37. In Milledgeville, 59% of the population over 15 years of age are married, 97% speak English and 0% speak Spanish. 79% of Milledgeville residents were born in Illinois, 18% were born out of state, 0% were born outside of the United States and 3% were foreign born.