Aetna Estates, CO has a population of 1,366 and is the 13,240th largest city in the United States. The population density is 10,383 per sq mi which is 20753% higher than the Colorado average and 11360% higher than the national average. The median age in Aetna Estates is 34 which is approximately 7% lower than the Colorado average of 36. In Aetna Estates, 53% of the population over 15 years of age are married, 41% speak English and 58% speak Spanish. 46% of Aetna Estates residents were born in Colorado, 25% were born out of state, 1% were born outside of the United States and 28% were foreign born.