Columbine, CO has a population of 25,281 and is the 1,709th largest city in the United States. The population density is 3,813 per sq mi which is 6708% higher than the Colorado average and 4108% higher than the national average. The median age in Columbine is 44 which is approximately 20% higher than the Colorado average of 36. In Columbine, 66% of the population over 15 years of age are married, 93% speak English and 3% speak Spanish. 45% of Columbine residents were born in Colorado, 49% were born out of state, 1% were born outside of the United States and 5% were foreign born.