Stonegate, CO has a population of 9,478 and is the 4,103rd largest city in the United States. The population density is 5,170 per sq mi which is 10283% higher than the Colorado average and 5606% higher than the national average. The median age in Stonegate is 34 which is approximately 5% lower than the Colorado average of 36. In Stonegate, 64% of the population over 15 years of age are married, 92% speak English and 5% speak Spanish. 43% of Stonegate residents were born in Colorado, 48% were born out of state, 2% were born outside of the United States and 7% were foreign born.