Star Junction, PA has a population of 475 and is the 19,844th largest city in the United States. The population density is 400 per sq mi which is 44% higher than the Pennsylvania average and 341% higher than the national average. The median age in Star Junction is 54 which is approximately 33% higher than the Pennsylvania average of 41. In Star Junction, 48% of the population over 15 years of age are married, 100% speak English and 0% speak Spanish. 90% of Star Junction residents were born in Pennsylvania, 9% were born out of state, 1% were born outside of the United States and 0% were foreign born.