Avondale, PA has a population of 1,430 and is the 12,971st largest city in the United States. The population density is 2,957 per sq mi which is 967% higher than the Pennsylvania average and 3164% higher than the national average. The median age in Avondale is 29 which is approximately 28% lower than the Pennsylvania average of 41. In Avondale, 49% of the population over 15 years of age are married, 38% speak English and 57% speak Spanish. 40% of Avondale residents were born in Pennsylvania, 17% were born out of state, 0% were born outside of the United States and 43% were foreign born.