Fredonia, PA has a population of 553 and is the 18,955th largest city in the United States. The population density is 1,549 per sq mi which is 459% higher than the Pennsylvania average and 1610% higher than the national average. The median age in Fredonia is 35 which is approximately 13% lower than the Pennsylvania average of 41. In Fredonia, 52% of the population over 15 years of age are married, 100% speak English and 0% speak Spanish. 93% of Fredonia residents were born in Pennsylvania, 7% were born out of state, 0% were born outside of the United States and 0% were foreign born.