Stevie Nicks (born 1948), American singer and songwriter, best known for her work with Fleetwood Mac

Garth Nix (born 1963), Australian author of young adult fantasy novels

Nix is a water creature in German and Scandinavian folklore. It may also refer to:

Robert N. C. Nix, Jr. (1928-2003), U.S. Chief Justice of the Pennsylvania Supreme Court from 1984 to 1996

Nix (moon), a natural satellite of Pluto

Nix v. Hedden (1893), a case in the United States Supreme Court

Don Nix, U.S. songwriter, composer, arranger, musician, and author

NYSE Group (NYX)

Nyx (mythology), in Greek mythology, the primordial goddess of the night

Nix Nought Nothing, a story collected by Joseph Jacobs in his English Fairy Tales

Nix, an evil cult leader portrayed in the movie Lord of Illusions

NYX (comic book), an American comic book miniseries by Marvel Comics

Robert N.C. Nix, Sr. (1897–1987), first African American to represent Pennsylvania in the House of Representatives

Nix Package Manager, a purely functional package and configuration manager for computer systems

Laynce Nix (born 1980), U.S. Major League Baseball outfielder

Nix v. Whiteside (1986), a United States Supreme Court decision

Kirksey Nix, reputedly the leader of the Dixie Mafia

Norwegian Internet Exchange, the internet exchange point in Oslo, Norway

James R. Nix, director of the Ellen G. White Estate since 2000

Bern Nix, U.S. jazz guitarist

Dyron Nix (born 1967), former American professional basketball player

Nix Jeans, a domestic Korean clothing manufacturer and jeans label

Willie Nix (d.1991), Blues drummer active in Memphis, Tennessee in the 1940s and 1950s

Nix (brachiopod), a brachiopod genus