Jermyn, PA has a population of 2,248 and is the 10,384th largest city in the United States. The population density is 2,837 per sq mi which is 924% higher than the Pennsylvania average and 3031% higher than the national average. The median age in Jermyn is 45 which is approximately 10% higher than the Pennsylvania average of 41. In Jermyn, 57% of the population over 15 years of age are married, 97% speak English and 1% speak Spanish. 81% of Jermyn residents were born in Pennsylvania, 14% were born out of state, 2% were born outside of the United States and 3% were foreign born.