Aviston, IL has a population of 2,299 and is the 10,261st largest city in the United States. The population density is 1,449 per sq mi which is 552% higher than the Illinois average and 1499% higher than the national average. The median age in Aviston is 36 which is approximately 4% lower than the Illinois average of 37. In Aviston, 66% of the population over 15 years of age are married, 98% speak English and 1% speak Spanish. 86% of Aviston residents were born in Illinois, 12% were born out of state, 0% were born outside of the United States and 1% were foreign born.