Julesburg, CO has a population of 1,242 and is the 13,825th largest city in the United States. The population density is 837 per sq mi which is 1581% higher than the Colorado average and 824% higher than the national average. The median age in Julesburg is 48 which is approximately 32% higher than the Colorado average of 36. In Julesburg, 60% of the population over 15 years of age are married, 86% speak English and 12% speak Spanish. 58% of Julesburg residents were born in Colorado, 36% were born out of state, 0% were born outside of the United States and 6% were foreign born.