Country Club Hills, IL has a population of 16,794 and is the 2,545th largest city in the United States. The population density is 3,478 per sq mi which is 1465% higher than the Illinois average and 3739% higher than the national average. The median age in Country Club Hills is 38 which is approximately 2% higher than the Illinois average of 37. In Country Club Hills, 41% of the population over 15 years of age are married, 94% speak English and 4% speak Spanish. 79% of Country Club Hills residents were born in Illinois, 18% were born out of state, 0% were born outside of the United States and 3% were foreign born.