Sedapatti R. Muthiah was an Indian politician of the Dravida Munnetra Kazhagam. He was one of the leaders of the All India Anna Dravida Munnetra Kazhagam (AIADMK) from its creation and was second in command in AIADMK until 1998. He was popularly known by the name Sedapattiar. He remained a popular politician in Madurai district and had a mass support base in T.Kallupatti Union.