Robert Mangold (born October 12, 1937) is an American minimalist artist.

Mangold was born in North Tonawanda, New York. His mother, Blanche, was a department store buyer, and his father, Aloysius Mangold, worked at an organ factory.

“Robert Mangold’s paintings,” wrote Michael Kimmelman in the New York Times in 1997, “are more complicated to describe than they seem, which is partly what’s good about them: the way they invite intense scrutiny, which, in the nature of good art, is its own reward.” His works are comprised often of simple elements which are put together through complex means. Mangold's work challenges the typical connotations of what a painting is or could be, and his works often appear as objects rather than images. Elements refer often to architectural elements or have the feeling of an architect's hands.

In 1965, the Jewish Museum in New York held the first major exhibition of what was called Minimal art and included Robert Mangold. In 1967, he won a National Endowment for the Arts grant and in 1969, a Guggenheim Fellowship. In 1971, he had his first solo museum exhibition at the Guggenheim Museum. He has been featured in the Whitney Biennial four times, in 1979, 1983, 1985, and 2004.