Berthoud, CO has a population of 5,766 and is the 5,902nd largest city in the United States. The population density is 461 per sq mi which is 826% higher than the Colorado average and 409% higher than the national average. The median age in Berthoud is 41 which is approximately 11% higher than the Colorado average of 36. In Berthoud, 64% of the population over 15 years of age are married, 96% speak English and 3% speak Spanish. 45% of Berthoud residents were born in Colorado, 51% were born out of state, 1% were born outside of the United States and 3% were foreign born.