Osceola Mills, PA has a population of 1,153 and is the 14,277th largest city in the United States. The population density is 3,496 per sq mi which is 1162% higher than the Pennsylvania average and 3759% higher than the national average. The median age in Osceola Mills is 43 which is approximately 5% higher than the Pennsylvania average of 41. In Osceola Mills, 62% of the population over 15 years of age are married, 99% speak English and 0% speak Spanish. 92% of Osceola Mills residents were born in Pennsylvania, 8% were born out of state, 0% were born outside of the United States and 0% were foreign born.