Colorado, "The Centennial State" was admitted to the Union in this year
..... quickly admitted the eastern portion of the Territory of Kansas into the Union... [DOC] [TLE] Colorado became the 38th state to join the Union, August 1, 1876 ... [PAR] Aug 1, 2011 ... Colorado is known as the Centennial State because it won statehood the same 
year the United States celebrated its centennial.