William B. Bankhead, American lawyer and politician, 47th Speaker of the United States House of Representatives (died 1940)

William Brockman Bankhead was an American politician who served as the 42nd speaker of the United States House of Representatives from 1936 to 1940, representing Alabama's 10th and later 7th congressional districts as a Democrat from 1917 to 1940. Bankhead was a strong liberal and a prominent supporter of President Franklin Roosevelt's New Deal of pro-labor union legislation, thus clashing with most other Southern Democrats in Congress at the time. Bankhead described himself as proud to be a politician, by which he meant that he did not neglect matters that concerned his district or reelection. He was the father of actress Tallulah Bankhead.

The speaker of the United States House of Representatives, commonly known as the speaker of the House or House speaker, is the presiding officer of the United States House of Representatives, the lower chamber of the United States Congress. The office was established in 1789 by Article I, Section II, of the U.S. Constitution. By custom and House rules, the speaker is the political and parliamentary leader of the House and is simultaneously its presiding officer, de facto leader of the body's majority party, and the institution's administrative head. Speakers also perform various other administrative and procedural functions. Given these many roles and responsibilities, the speaker usually does not personally preside over debates—that duty is instead delegated to members of the House from the majority party—nor regularly participate in floor debates.