Glendale, AZ has a population of 239,943 and is the 86th largest city in the United States. The population density is 4,034 per sq mi which is 6916% higher than the Arizona average and 4352% higher than the national average. The median age in Glendale is 34 which is approximately 9% lower than the Arizona average of 37. In Glendale, 48% of the population over 15 years of age are married, 68% speak English and 24% speak Spanish. 42% of Glendale residents were born in Arizona, 40% were born out of state, 1% were born outside of the United States and 17% were foreign born.