Stonewall Gap, CO has a population of 45 and is the 28,274th largest city in the United States. The population density is 23 per sq mi which is 53% lower than the Colorado average and 74% lower than the national average. The median age in Stonewall Gap is 61 which is approximately 69% higher than the Colorado average of 36. In Stonewall Gap, 71% of the population over 15 years of age are married, 91% speak English and 0% speak Spanish. 24% of Stonewall Gap residents were born in Colorado, 76% were born out of state, 0% were born outside of the United States and 0% were foreign born.