Sheridan, CO has a population of 5,965 and is the 5,776th largest city in the United States. The population density is 2,683 per sq mi which is 5288% higher than the Colorado average and 2861% higher than the national average. The median age in Sheridan is 34 which is approximately 8% lower than the Colorado average of 36. In Sheridan, 40% of the population over 15 years of age are married, 74% speak English and 22% speak Spanish. 49% of Sheridan residents were born in Colorado, 36% were born out of state, 1% were born outside of the United States and 13% were foreign born.