Monroeville, PA has a population of 28,250 and is the 1,513th largest city in the United States. The population density is 1,433 per sq mi which is 417% higher than the Pennsylvania average and 1482% higher than the national average. The median age in Monroeville is 44 which is approximately 9% higher than the Pennsylvania average of 41. In Monroeville, 59% of the population over 15 years of age are married, 91% speak English and 1% speak Spanish. 78% of Monroeville residents were born in Pennsylvania, 14% were born out of state, 1% were born outside of the United States and 7% were foreign born.