At a Glance
Colorado
state, United States
Also known as: Centennial State
Colorado, constituent state of the United States of America. It is classified as one of the Mountain states, although only about half of its area lies in the Rocky Mountains. It borders Wyoming and Nebraska to the north, Nebraska and Kansas to the east, Oklahoma and New Mexico to the south, Arizona to the southwest, and Utah to the west. Colorado was admitted to the union on August 1, 1876, as the 38th state. The...