Buena Vista, CO has a population of 2,690 and is the 9,383rd largest city in the United States. The population density is 777 per sq mi which is 1460% higher than the Colorado average and 757% higher than the national average. The median age in Buena Vista is 39 which is approximately 6% higher than the Colorado average of 36. In Buena Vista, 63% of the population over 15 years of age are married, 98% speak English and 1% speak Spanish. 47% of Buena Vista residents were born in Colorado, 51% were born out of state, 1% were born outside of the United States and 1% were foreign born.