Huntley, IL has a population of 25,831 and is the 1,666th largest city in the United States. The population density is 1,799 per sq mi which is 709% higher than the Illinois average and 1885% higher than the national average. The median age in Huntley is 46 which is approximately 24% higher than the Illinois average of 37. In Huntley, 76% of the population over 15 years of age are married, 86% speak English and 4% speak Spanish. 73% of Huntley residents were born in Illinois, 14% were born out of state, 3% were born outside of the United States and 10% were foreign born.