Trinidad is a Home Rule Municipality that is the county seat and the most populous city of Las Animas County, Colorado, United States. The population was 9,096 as of the 2010 census, up slightly from 9,078 in 2000. The estimate as of 2012 was 8,771. Trinidad lies 21 miles (33 kilometers) north of Raton, New Mexico and 195 miles (305 km) south of Denver.