Trinidad, CO has a population of 8,280 and is the 4,583rd largest city in the United States. The population density is 893 per sq mi which is 1693% higher than the Colorado average and 885% higher than the national average. The median age in Trinidad is 42 which is approximately 15% higher than the Colorado average of 36. In Trinidad, 55% of the population over 15 years of age are married, 84% speak English and 13% speak Spanish. 57% of Trinidad residents were born in Colorado, 37% were born out of state, 1% were born outside of the United States and 5% were foreign born.