Park Ridge, IL has a population of 37,567 and is the 1,105th largest city in the United States. The population density is 5,301 per sq mi which is 2225% higher than the Illinois average and 5751% higher than the national average. The median age in Park Ridge is 44 which is approximately 18% higher than the Illinois average of 37. In Park Ridge, 65% of the population over 15 years of age are married, 78% speak English and 4% speak Spanish. 71% of Park Ridge residents were born in Illinois, 14% were born out of state, 1% were born outside of the United States and 14% were foreign born.