The Yale Political Union (YPU) is a debate society at Yale University, founded in 1934 by Alfred Whitney Griswold. It was modeled on the Cambridge Union and Oxford Union and the party system of the defunct Yale Unions of the late nineteenth and early twentieth centuries, which were in turn inspired by the great literary debating societies of Linonia and Brothers in Unity. Members of the YPU have reciprocal rights at sister societies in England.

Yale University is a private Ivy League research university in New Haven, Connecticut. Founded in 1701, Yale is the third-oldest institution of higher education in the United States, and one of the nine colonial colleges chartered before the American Revolution.