Cottonwood, ID has a population of 944 and is the 15,490th largest city in the United States. The population density is 1,125 per sq mi which is 5795% higher than the Idaho average and 1142% higher than the national average. The median age in Cottonwood is 41 which is approximately 15% higher than the Idaho average of 36. In Cottonwood, 65% of the population over 15 years of age are married, 98% speak English and 1% speak Spanish. 56% of Cottonwood residents were born in Idaho, 40% were born out of state, 2% were born outside of the United States and 2% were foreign born.