Colorado, “the Centennial State,” was the thirty-eighth state to enter the Union on August 1, 1876. Its diverse geography encompasses 104,094 square miles of the American West and includes swathes of the Great Plains, southern Rocky Mountains, and the…

History Colorado (HC) was founded in 1879 by the state legislature as the State Historical and Natural History Society. Later known as the Colorado Historical Society, it assumed its current name in 2009. HC is a 501(c)(3) nonprofit educational…

TERRITORY: February 28, 1861 STATEHOOD: August 1, 1876 CAPITAL: Denver MOTTO: “Nil Sine Numine” – “Nothing without Providence” NICKNAMES: The Centennial State, The Highest State, The Columbine State TOTAL POPULATION (2020 census): 5,773,714 …