Fox Lake Hills, IL has a population of 2,196 and is the 10,494th largest city in the United States. The population density is 1,753 per sq mi which is 689% higher than the Illinois average and 1835% higher than the national average. The median age in Fox Lake Hills is 48 which is approximately 29% higher than the Illinois average of 37. In Fox Lake Hills, 59% of the population over 15 years of age are married, 98% speak English and 1% speak Spanish. 75% of Fox Lake Hills residents were born in Illinois, 22% were born out of state, 0% were born outside of the United States and 2% were foreign born.