Harvard Law School (also known as Harvard Law or HLS) is one of the professional graduate schools of Harvard University, located in Cambridge, Massachusetts. Founded in 1817, it is the oldest continually-operating law school in the United States and is home to the largest academic law library in the world. The law school is generally considered one of the most prestigious in the world.

HLS has a considerably bigger class size than most law schools – each class in the three-year J.D. program has approximately 560 students, the largest of the top 150 ranked law schools in the United States. With a current enrollment of 1,990, HLS has about as many students as its three closest-ranked peer institutions (first-ranked Yale, second-ranked Stanford, and fourth-ranked Chicago) combined. The first-year (1L) class is broken into seven sections of approximately 80 students, who take most first-year classes together. Harvard's uniquely large class size and its prestige have led the law school to graduate a great many distinguished alumni in the judiciary, government, and the business world.