Duncan, AZ has a population of 691 and is the 17,566th largest city in the United States. The population density is 321 per sq mi which is 459% higher than the Arizona average and 254% higher than the national average. The median age in Duncan is 50 which is approximately 35% higher than the Arizona average of 37. In Duncan, 64% of the population over 15 years of age are married, 75% speak English and 24% speak Spanish. 66% of Duncan residents were born in Arizona, 32% were born out of state, 0% were born outside of the United States and 2% were foreign born.
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The population density in Duncan is 459% higher than Arizona.
The median age in Duncan is 35% higher than Arizona.
In Duncan 96.82% of the population is White.
In Duncan 0.00% of the population is Black or African American.