Harrisburg, PA has a population of 49,160 and is the 836th largest city in the United States. The population density is 6,047 per sq mi which is 2082% higher than the Pennsylvania average and 6574% higher than the national average. The median age in Harrisburg is 32 which is approximately 22% lower than the Pennsylvania average of 41. In Harrisburg, 36% of the population over 15 years of age are married, 80% speak English and 12% speak Spanish. 63% of Harrisburg residents were born in Pennsylvania, 21% were born out of state, 5% were born outside of the United States and 11% were foreign born.