Heilwood, PA has a population of 497 and is the 19,575th largest city in the United States. The population density is 131 per sq mi which is 53% lower than the Pennsylvania average and 44% higher than the national average. The median age in Heilwood is 45 which is approximately 10% higher than the Pennsylvania average of 41. In Heilwood, 55% of the population over 15 years of age are married, 99% speak English and 0% speak Spanish. 91% of Heilwood residents were born in Pennsylvania, 8% were born out of state, 1% were born outside of the United States and 0% were foreign born.