Severance, CO has a population of 3,603 and is the 7,917th largest city in the United States. The population density is 545 per sq mi which is 995% higher than the Colorado average and 502% higher than the national average. The median age in Severance is 36 which is approximately 1% lower than the Colorado average of 36. In Severance, 75% of the population over 15 years of age are married, 95% speak English and 5% speak Spanish. 50% of Severance residents were born in Colorado, 48% were born out of state, 0% were born outside of the United States and 2% were foreign born.