Antoine Marc Gaudin (August 8, 1900 – August 23, 1974) was a metallurgist who laid the foundation for understanding the scientific principles of the froth flotation process in the minerals industry.
He was also a professor at the Massachusetts Institute of Technology, and during World War II developed there the ore-processing techniques needed to extract uranium from its low grade ores for the Manhattan Project.
He was a founding member of the National Academy of Engineering.