Colorado is one of the Mountain States and is a part of the western and southwestern United States. Its Nickname Centennial State. It is also known as Colorful Colorado. It is famous for mountains, rivers, forests, high plains, canyons, mesas, plateaus, and desert lands. Colorado Zip Code started with the digit 8000. The total number of Colorado Zip Code approximately 642. The total population of Colorado about 5,758,736. So you can find any information about Colorado especially zip codes, area codes, Populations, cities, county and so on.