Diwan Bahadur Sir Satappa Ramanatha Muttaiya Annamalai Chettiar, Raja of Chettinad KCSI (30 September 1881 – 15 June 1948) was an Indian industrialist, banker, educationist and philanthropist from Tamil Nadu. He is the founder of Annamalai University in Chidambaram and one of the founders of Indian Bank, along with his brother S. Rm. M. Ramaswami Chettiar.