Tiruchi Swaminathan Iyer (1 December 1910 - 1998) was a Carnatic vocal singer and scholar.
He was born in 1910 in the city of Tiruchirappalli in the state of Tamil Nadu, South India. He learned music from his father Thiruvayar Subrahmanya Iyer. He gave his first concert at Thiruvisalur Ayyaval Utsavam held near Kumbakonam in 1926. Since then he has given many musical performances. He is famous for singing rare works of Tyagaraja. His grand father Orappalli Ayya Bhagavathar was a direct disciple of Saint Tyagaraja. Besides singing vocal music, he took up a career as a music instructor. He taught music to many disciples.