Keenesburg, CO has a population of 1,227 and is the 13,897th largest city in the United States. The population density is 469 per sq mi which is 843% higher than the Colorado average and 418% higher than the national average. The median age in Keenesburg is 36 which is approximately 2% lower than the Colorado average of 36. In Keenesburg, 56% of the population over 15 years of age are married, 91% speak English and 9% speak Spanish. 64% of Keenesburg residents were born in Colorado, 33% were born out of state, 0% were born outside of the United States and 3% were foreign born.