Conrad Hilton, Jr. (July 6, 1926 – February 5, 1969), also known as "Nicky" Hilton, was an American heir of the Hilton Hotel chain, a business executive and TWA director.

He was born Conrad Nicholson Hilton, Jr. in Dallas, Texas, the eldest son of Conrad Nicholson Hilton and Mary Adelaide Barron. His father founded Hilton Hotels. His brothers are William Barron Hilton and Eric Michael Hilton. He also has a younger half-sister, Francesca Hilton, whose mother is Zsa Zsa Gabor.

He had two wives, actress Elizabeth Taylor (married May 6, 1950-divorced 1951) and oil heiress Patricia "Trish" McClintock (married November 26, 1958-divorced 1965).

Hilton and Trish McClintock had two children, Conrad Nicholson Hilton, III (born 1959) and Michael Otis Hilton (born 1961).

He is a granduncle of celebrity sisters Paris Hilton and Nicky Hilton, who shares his nickname.

Nicky Hilton died of a heart attack in West Los Angeles, California, at the age of forty-two. He is interred in the Holy Cross Cemetery in Culver City.