Fayette City, PA has a population of 617 and is the 18,278th largest city in the United States. The population density is 3,214 per sq mi which is 1060% higher than the Pennsylvania average and 3448% higher than the national average. The median age in Fayette City is 36 which is approximately 12% lower than the Pennsylvania average of 41. In Fayette City, 50% of the population over 15 years of age are married, 96% speak English and 2% speak Spanish. 91% of Fayette City residents were born in Pennsylvania, 7% were born out of state, 1% were born outside of the United States and 0% were foreign born.