Hinsdale, IL has a population of 17,438 and is the 2,477th largest city in the United States. The population density is 3,779 per sq mi which is 1600% higher than the Illinois average and 4071% higher than the national average. The median age in Hinsdale is 41 which is approximately 9% higher than the Illinois average of 37. In Hinsdale, 68% of the population over 15 years of age are married, 89% speak English and 3% speak Spanish. 60% of Hinsdale residents were born in Illinois, 29% were born out of state, 1% were born outside of the United States and 11% were foreign born.