Twin Lakes, CO has a population of 6,645 and is the 5,369th largest city in the United States. The population density is 4,042 per sq mi which is 8018% higher than the Colorado average and 4361% higher than the national average. The median age in Twin Lakes is 35 which is approximately 4% lower than the Colorado average of 36. In Twin Lakes, 51% of the population over 15 years of age are married, 55% speak English and 42% speak Spanish. 54% of Twin Lakes residents were born in Colorado, 21% were born out of state, 1% were born outside of the United States and 24% were foreign born.