John Wright Hickenlooper Jr. (born February 7, 1952) is an American politician serving as the junior United States senator from Colorado since 2021.

A member of the Democratic Party, he served as the 42nd governor of Colorado from 2011 to 2019 and as the 43rd mayor of Denver from 2003 to 2011. He was a geologist and businessman before entering politics. Born in Narberth, Pennsylvania, Hickenlooper is a graduate of Wesleyan University.