Cottonwood, AZ has a population of 11,598 and is the 3,514th largest city in the United States. The population density is 699 per sq mi which is 1116% higher than the Arizona average and 672% higher than the national average. The median age in Cottonwood is 46 which is approximately 25% higher than the Arizona average of 37. In Cottonwood, 52% of the population over 15 years of age are married, 80% speak English and 18% speak Spanish. 29% of Cottonwood residents were born in Arizona, 60% were born out of state, 1% were born outside of the United States and 10% were foreign born.