Window Rock, AZ has a population of 3,355 and is the 8,255th largest city in the United States. The population density is 635 per sq mi which is 1004% higher than the Arizona average and 600% higher than the national average. The median age in Window Rock is 35 which is approximately 5% lower than the Arizona average of 37. In Window Rock, 32% of the population over 15 years of age are married, 44% speak English and 0% speak Spanish. 69% of Window Rock residents were born in Arizona, 29% were born out of state, 0% were born outside of the United States and 1% were foreign born.