Colorado.Careers.org

The State of Colorado is a state located in the Rocky Mountain region of the United States of America. Colorado may also be considered to be a part of the Western and Southwestern regions of the United States. The United States Census Bureau estimates that the state population was 4,861,515 in 2007, a 13.03% increase since the U.S. Census 2000. Denver is the capital as well as the most populous city of Colorado. Citizens of Colorado are known as Coloradans.
(from wikipedia)
25 Largest Cities in the State of Colorado
Counties in the State of Colorado