Wesberry v. Sanders, 376 U.S. 1 (1964), was a landmark U.S. Supreme Court case in which the Court ruled that districts in the United States House of Representatives must be approximately equal in population. Along with Baker v. Carr (1962) and Reynolds v. Sims (1964), it was part of a series of Warren Court cases that applied the principle of "one person, one vote" to U.S. legislative bodies.