Fallston, PA has a population of 224 and is the 23,944th largest city in the United States. The population density is 469 per sq mi which is 69% higher than the Pennsylvania average and 418% higher than the national average. The median age in Fallston is 42 which is approximately 4% higher than the Pennsylvania average of 41. In Fallston, 49% of the population over 15 years of age are married, 97% speak English and 2% speak Spanish. 94% of Fallston residents were born in Pennsylvania, 6% were born out of state, 0% were born outside of the United States and 0% were foreign born.