Prestbury, IL has a population of 1,780 and is the 11,705th largest city in the United States. The population density is 2,823 per sq mi which is 1170% higher than the Illinois average and 3016% higher than the national average. The median age in Prestbury is 58 which is approximately 55% higher than the Illinois average of 37. In Prestbury, 83% of the population over 15 years of age are married, 97% speak English and 0% speak Spanish. 70% of Prestbury residents were born in Illinois, 29% were born out of state, 0% were born outside of the United States and 1% were foreign born.