Located in the western central part of the United States, Colorado is the eighth largest state in terms of physical size and the 21st biggest in terms of population. This results in Colorado being one of the most sparsely populated states of all. Nicknamed the Centennial State, Colorado covers an area of 104,094 square miles and has an estimated population of 5.6 million. Colorado earned its nickname due to the fact that it officially became a state 100 years after the Declaration of Independence was signed.
