Oakwood Hills, IL has a population of 2,115 and is the 10,693rd largest city in the United States. The population density is 1,795 per sq mi which is 708% higher than the Illinois average and 1881% higher than the national average. The median age in Oakwood Hills is 42 which is approximately 11% higher than the Illinois average of 37. In Oakwood Hills, 58% of the population over 15 years of age are married, 93% speak English and 3% speak Spanish. 77% of Oakwood Hills residents were born in Illinois, 19% were born out of state, 1% were born outside of the United States and 4% were foreign born.