William & Mary Law School, formally the Marshall-Wythe School of Law, is the law school of the College of William & Mary, a public research university in Williamsburg, Virginia. It is the oldest extant law school in the United States, having been founded in 1779 at the urging of alumnus Thomas Jefferson. As of 2023, it has an enrollment of 606 full-time students seeking a Juris Doctor (J.D.) or a Master of Laws (LL.M.) in the American Legal System, a two or three semester program for lawyers trained outside the United States.

A law school in the United States is an educational institution where students obtain a professional education in law after first obtaining an undergraduate degree.