William Branch Giles was an American statesman, long-term Senator from Virginia, and the 24th Governor of Virginia. He served in the House of Representatives from 1790 to 1798 and again from 1801 to 1803; in between, he was a member of the Virginia House of Delegates, and was an Elector for Jefferson in 1800. He served as a United States Senator from 1804 to 1815, and then served briefly in the House of Delegates again. After a time in private life, he joined the opposition to John Quincy Adams and Henry Clay, in 1824; he ran for the Senate again in 1825, and was defeated, but appointed Governor for 3 one-year terms in 1827; he was succeeded by John Floyd, in the year of his death.