Thomas Brackett Reed Jr. (October 18, 1839 – December 7, 1902) was an American attorney and Republican Party politician from Maine who served as the 32nd Speaker of the United States House of Representatives for three nonconsecutive terms from 1889 to 1891 and 1895 to 1899. His first term was marked by a dramatic expansion of the Speaker's formal authority through changes to the House Rules, and he remains one of the most powerful Speakers in House history.

Prior to his service in Congress, Reed was represented Portland in the Maine House of Representatives and Senate and served as Attorney General of Maine. In 1876, he was elected to represent Cumberland and York counties in the U.S. House and was re-elected for twelve consecutive terms.

As Speaker, Reed had greater influence over the agenda and operations of the House than any prior Speaker. He increased the Speaker's power limiting the ability of the minority party to prevent the establishment of a quorum. Reed helped pass the Lodge Bill, which sought to protect African American voting rights in the Southern United States, but the bill failed in the Senate and never became law.

In 1896, he ran for President but lost the Republican nomination to William McKinley. While serving as Speaker in 1899, Reed resigned from the House in protest against the Spanish-American War.