Chestnut, IL has a population of 134 and is the 26,069th largest city in the United States. The population density is 1,221 per sq mi which is 449% higher than the Illinois average and 1248% higher than the national average. The median age in Chestnut is 33 which is approximately 13% lower than the Illinois average of 37. In Chestnut, 93% of the population over 15 years of age are married, 69% speak English and 0% speak Spanish. 69% of Chestnut residents were born in Illinois, 0% were born out of state, 6% were born outside of the United States and 25% were foreign born.