Black Forest, CO has a population of 13,506 and is the 3,097th largest city in the United States. The population density is 134 per sq mi which is 170% higher than the Colorado average and 48% higher than the national average. The median age in Black Forest is 47 which is approximately 30% higher than the Colorado average of 36. In Black Forest, 75% of the population over 15 years of age are married, 95% speak English and 2% speak Spanish. 27% of Black Forest residents were born in Colorado, 65% were born out of state, 4% were born outside of the United States and 4% were foreign born.