Avondale, AZ has a population of 80,631 and is the 430th largest city in the United States. The population density is 1,782 per sq mi which is 3000% higher than the Arizona average and 1867% higher than the national average. The median age in Avondale is 30 which is approximately 18% lower than the Arizona average of 37. In Avondale, 49% of the population over 15 years of age are married, 63% speak English and 32% speak Spanish. 44% of Avondale residents were born in Arizona, 39% were born out of state, 1% were born outside of the United States and 15% were foreign born.