Ramamoorthy Ramesh (born 1960) is an American materials scientist of Indian descent who has contributed to the synthesis, assembly and understanding of complex functional oxides, such as ferroelectric materials. In particular, he has worked on the development of ferroelectric perovskites, manganites with colossal magnetoresistance, and also on multiferroic oxides with potential benefits for modern information technologies. He is a Professor at the University of California Berkeley in the Department of Materials Science and Engineering, and Physics.