Fort Carson, CO has a population of 14,873 and is the 2,854th largest city in the United States. The population density is 1,732 per sq mi which is 3378% higher than the Colorado average and 1811% higher than the national average. The median age in Fort Carson is 22 which is approximately 39% lower than the Colorado average of 36. In Fort Carson, 45% of the population over 15 years of age are married, 89% speak English and 8% speak Spanish. 9% of Fort Carson residents were born in Colorado, 82% were born out of state, 5% were born outside of the United States and 4% were foreign born.