List of United States senators from Colorado
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Colorado was admitted to the Union on August 1, 1876 and elects U.S. senators to Senate class 2 and class 3. Its current U.S. senators are Democrats Michael Bennet (serving since 2009) and John Hickenlooper (serving since 2021). Henry M. Teller was Colorado's longest-serving senator (1876–1882; 1885–1909). Colorado is one of fifteen states alongside Arizona, Florida, Georgia, Hawaii, Idaho, Indiana, Louisiana, Maine, Massachusetts, Minnesota, Missouri, Nevada, South Dakota and Utah to have a younger senior senator and an older junior senator.