Antonito, CO has a population of 789 and is the 16,703rd largest city in the United States. The population density is 1,956 per sq mi which is 3829% higher than the Colorado average and 2059% higher than the national average. The median age in Antonito is 41 which is approximately 14% higher than the Colorado average of 36. In Antonito, 50% of the population over 15 years of age are married, 51% speak English and 48% speak Spanish. 84% of Antonito residents were born in Colorado, 14% were born out of state, 1% were born outside of the United States and 1% were foreign born.