Campton Hills, IL has a population of 11,500 and is the 3,537th largest city in the United States. The population density is 679 per sq mi which is 206% higher than the Illinois average and 650% higher than the national average. The median age in Campton Hills is 42 which is approximately 11% higher than the Illinois average of 37. In Campton Hills, 68% of the population over 15 years of age are married, 96% speak English and 1% speak Spanish. 72% of Campton Hills residents were born in Illinois, 23% were born out of state, 0% were born outside of the United States and 5% were foreign born.