The Anti-Saloon League, now known as the American Council on Addiction and Alcohol Problems, is an organization of the temperance movement in the United States.
Founded in 1893 in Oberlin, Ohio, it was a key component of the Progressive Era, and was strongest in the South and rural North, drawing support from Protestant ministers and their congregations, especially Methodists, Baptists, Disciples and Congregationalists. It concentrated on legislation, and cared about how legislators had voted, not whether they drank or not. Established initially as an Ohio state society, its influence spread rapidly. In 1895, it became a national organization and quickly rose to become the most powerful prohibition lobby in America, overshadowing the older Woman's Christian Temperance Union and the Prohibition Party. Its triumph was nationwide prohibition locked into the Constitution with passage of the 18th Amendment in 1919. It was decisively defeated when Prohibition was repealed in 1933.