Park City, IL has a population of 7,402 and is the 4,980th largest city in the United States. The population density is 6,389 per sq mi which is 2774% higher than the Illinois average and 6952% higher than the national average. The median age in Park City is 27 which is approximately 29% lower than the Illinois average of 37. In Park City, 48% of the population over 15 years of age are married, 35% speak English and 58% speak Spanish. 51% of Park City residents were born in Illinois, 11% were born out of state, 1% were born outside of the United States and 37% were foreign born.