Merrionette Park, IL has a population of 1,896 and is the 11,344th largest city in the United States. The population density is 5,055 per sq mi which is 2174% higher than the Illinois average and 5479% higher than the national average. The median age in Merrionette Park is 38 which is approximately 1% higher than the Illinois average of 37. In Merrionette Park, 49% of the population over 15 years of age are married, 90% speak English and 7% speak Spanish. 87% of Merrionette Park residents were born in Illinois, 8% were born out of state, 0% were born outside of the United States and 5% were foreign born.