Eaton, CO has a population of 4,791 and is the 6,651st largest city in the United States. The population density is 1,703 per sq mi which is 3319% higher than the Colorado average and 1779% higher than the national average. The median age in Eaton is 33 which is approximately 9% lower than the Colorado average of 36. In Eaton, 67% of the population over 15 years of age are married, 92% speak English and 6% speak Spanish. 70% of Eaton residents were born in Colorado, 27% were born out of state, 0% were born outside of the United States and 4% were foreign born.