Paul Thek (November 2, 1933 - August 10, 1988) was an American painter and, later, sculptor and installation artist. Born in Brooklyn, he studied locally, at the Art Students League and the Pratt Institute. In 1951 he entered the Cooper Union.

Although Thek began as a painter, he became known later in life for his sculptures and installations. Notable works include Technological Reliquaries (1964-67), a series of wax sculptures of human body parts, and The Tomb, a bright pink pyramid installation or "environment", which was badly damaged in 1981 but is documented in Edwin Klein's black and white photographs. Today his work may be seen in numerous collections, including that of the Hirshhorn Museum and Sculpture Garden in Washington, D.C. and the Whitney Museum of American Art in New York.

Thek, who was bisexual, died of AIDS related illness in New York City in 1988.

George Joseph Thek was born the second of four children to parents of German and Irish ancestry. In 1950, Thek studied at the Art Students League of New York as well as Pratt Institute in Brooklyn, and finally at the Cooper Union School of the Arts in New York from 1951 until 1954. In 1954, Thek moved to Miami and worked in several different occupations. During this time, he created some of his first well-known drawings, including studies in charcoal and graphite, later followed by abstract watercolors and monochrome oil paintings. Thek first referred to himself as Paul Thek starting in 1955. In 1957 Thek exhibited his works for the first time in a Miami gallery.