Pittsburgh, PA has a population of 305,305 and is the 62nd largest city in the United States. The population density is 5,513 per sq mi which is 1889% higher than the Pennsylvania average and 5985% higher than the national average. The median age in Pittsburgh is 33 which is approximately 19% lower than the Pennsylvania average of 41. In Pittsburgh, 39% of the population over 15 years of age are married, 89% speak English and 2% speak Spanish. 70% of Pittsburgh residents were born in Pennsylvania, 20% were born out of state, 1% were born outside of the United States and 9% were foreign born.