Ogden Livingston Mills was an American lawyer, businessman and politician. He served as United States Secretary of the Treasury in President Herbert Hoover's cabinet, during which time Mills pushed for tax increases, spending cuts and other austerity measures that would deepen the economic crisis. A member of the Republican Party, Mills also represented New York in the United States House of Representatives, served as Undersecretary of the Treasury during the administration of President Calvin Coolidge, and was the Republican nominee in the 1926 New York gubernatorial election.

The United States secretary of the treasury is the head of the United States Department of the Treasury, and is the chief financial officer of the federal government of the United States. The secretary of the treasury serves as the principal advisor to the president of the United States on all matters pertaining to economic and fiscal policy. The secretary is, by custom, a member of the president's cabinet and, by law, a member of the National Security Council.