Gunnison, CO has a population of 6,086 and is the 5,708th largest city in the United States. The population density is 1,464 per sq mi which is 2841% higher than the Colorado average and 1516% higher than the national average. The median age in Gunnison is 25 which is approximately 30% lower than the Colorado average of 36. In Gunnison, 33% of the population over 15 years of age are married, 87% speak English and 11% speak Spanish. 54% of Gunnison residents were born in Colorado, 39% were born out of state, 3% were born outside of the United States and 5% were foreign born.