Colorado City is a census-designated place and post office in and governed by Pueblo County, Colorado, United States. The CDP is a part of the Pueblo, CO Metropolitan Statistical Area. The Colorado City post office has the ZIP Code 81019. At the United States Census 2020, the population of the Colorado City CDP was 2,237. The Colorado City M…Colorado City is a census-designated place and post office in and governed by Pueblo County, Colorado, United States. The CDP is a part of the Pueblo, CO Metropolitan Statistical Area. The Colorado City post office has the ZIP Code 81019. At the United States Census 2020, the population of the Colorado City CDP was 2,237. The Colorado City Metropolitan District provides services.