Danville, PA has a population of 4,664 and is the 6,773rd largest city in the United States. The population density is 2,998 per sq mi which is 982% higher than the Pennsylvania average and 3210% higher than the national average. The median age in Danville is 37 which is approximately 9% lower than the Pennsylvania average of 41. In Danville, 39% of the population over 15 years of age are married, 94% speak English and 3% speak Spanish. 82% of Danville residents were born in Pennsylvania, 14% were born out of state, 1% were born outside of the United States and 3% were foreign born.