Dewey-Humboldt, AZ has a population of 3,965 and is the 7,489th largest city in the United States. The population density is 213 per sq mi which is 271% higher than the Arizona average and 135% higher than the national average. The median age in Dewey-Humboldt is 52 which is approximately 39% higher than the Arizona average of 37. In Dewey-Humboldt, 71% of the population over 15 years of age are married, 93% speak English and 5% speak Spanish. 31% of Dewey-Humboldt residents were born in Arizona, 62% were born out of state, 2% were born outside of the United States and 5% were foreign born.