Berkley, CO has a population of 11,594 and is the 3,516th largest city in the United States. The population density is 3,226 per sq mi which is 6379% higher than the Colorado average and 3461% higher than the national average. The median age in Berkley is 33 which is approximately 9% lower than the Colorado average of 36. In Berkley, 45% of the population over 15 years of age are married, 60% speak English and 36% speak Spanish. 53% of Berkley residents were born in Colorado, 25% were born out of state, 1% were born outside of the United States and 20% were foreign born.