Samuel Williston (September 24, 1861 - February 18, 1963) is an American lawyer and law professor.
Early in Williston's career, from 1888 to 1889 he worked as the private secretary to Supreme Court Justice Horace Gray. In the summer of 1889, he helped to collate laws from various U.S states in order to help formulate the state constitutions of North Dakota and South Dakota.
He became a consultant for the Boston law firm Hale & Darr from 1938 to 1956, during which time he was engaged in some Supreme Court cases such as "Kneeland v. AT&T" and "Chase National Bank v. Sayles." Williston actually argued the case of "Boston & Maine Railroad v. Hooker" before the U.S. Supreme Court on December 10 and 11, 1913, where he represented the defense for Hooker and ultimately lost the case.
In 1929, Williston was honored with the very first American Bar Association medal for "conspicuous service to American jurisprudence."