Durango, CO has a population of 17,817 and is the 2,430th largest city in the United States. The population density is 1,282 per sq mi which is 2475% higher than the Colorado average and 1315% higher than the national average. The median age in Durango is 33 which is approximately 11% lower than the Colorado average of 36. In Durango, 42% of the population over 15 years of age are married, 90% speak English and 6% speak Spanish. 31% of Durango residents were born in Colorado, 64% were born out of state, 1% were born outside of the United States and 4% were foreign born.