Parma Heights, OH has a population of 20,311 and is the 2,143rd largest city in the United States. The population density is 4,853 per sq mi which is 1784% higher than the Ohio average and 5256% higher than the national average. The median age in Parma Heights is 40 which is approximately 2% higher than the Ohio average of 39. In Parma Heights, 54% of the population over 15 years of age are married, 86% speak English and 2% speak Spanish. 73% of Parma Heights residents were born in Ohio, 15% were born out of state, 2% were born outside of the United States and 10% were foreign born.