Samuel Anthony Alito, Jr. (born April 1, 1950) is an Associate Justice of the Supreme Court of the United States. He was appointed by President George W. Bush and has served on the court since January 31, 2006.

Raised in Hamilton Township, New Jersey and educated at Princeton University and Yale Law School, Alito served as U.S. Attorney for the District of New Jersey and a judge on the United States Court of Appeals for the Third Circuit prior to joining the Supreme Court. He is the 110th justice and the second Italian American to serve on the court. Alito is generally considered a fairly conservative jurist with a libertarian streak (especially on First Amendment issues related to religious affairs).

Alito was born in Trenton, New Jersey, to Italian American parents: Italian immigrant Samuel A. Alito, Sr., and the former Rose Fradusco. Alito's father, now deceased, was a high school teacher and then became the first Director of the New Jersey Office of Legislative Services, a position he held from 1952 to 1984. Alito's mother is a retired schoolteacher.