The Great Seal of the State of Colorado is an adaptation of the territorial seal which was adopted by the First Territorial Assembly on November 6, 1861. The only changes made to the territorial seal design being the substitution of the words "State of Colorado" and the figures "1876" for the corresponding inscriptions on the territorial seal. The first General Assembly of the State of Colorado approved the adoption of the state seal on March 15, 1877. The Colorado Secretary of State alone is authorized to affix the Great Seal of Colorado to any document whatsoever.

The secretary of state of Colorado is the secretary of state of the state of Colorado in the United States. The office is one of five elected constitutional offices in the state. The current secretary of state is Democrat Jena Griswold.