Greenville, PA has a population of 5,794 and is the 5,883rd largest city in the United States. The population density is 3,071 per sq mi which is 1008% higher than the Pennsylvania average and 3290% higher than the national average. The median age in Greenville is 30 which is approximately 27% lower than the Pennsylvania average of 41. In Greenville, 44% of the population over 15 years of age are married, 98% speak English and 1% speak Spanish. 74% of Greenville residents were born in Pennsylvania, 25% were born out of state, 0% were born outside of the United States and 1% were foreign born.