Lincoln Clark Andrews (1867–1950) was a brigadier general in the United States Army during World War I and Assistant Secretary of the Treasury starting in 1925. As Assistant Secretary of the Treasury, he was in charge of Prohibition enforcement. Time magazine called his forces the Prohibition Army.
He was born on November 21, 1867, in Owatonna, Minnesota, to Charles T. Andrews and Mary Clark Andrews. He attended Cornell University from 1888 to 1889.
He attended the United States Military Academy, graduating number thirteen of fifty-one in 1893. As a 2nd lieutenant, he commanded Troop G of the 3rd Cavalry, with which he served during the Pullman Strike riots in Chicago in 1894.
During the Spanish–American War, he served as an aide to Gen. Edwin Vose Sumner, the commanding general of the cavalry division.