Sudha Ragunathan is an Indian Carnatic vocalist, singer and composer. She was conferred the Kalaimamani award by the Government of Tamil Nadu in 1994, Padma Shri (2004) and Padma Bhushan (2015) by the Government of India, and Sangeetha Kalanidhi by Madras Music Academy in 2013.

The Kalaimamani is the highest civilian award in the state of Tamil Nadu, India. These awards are given by the Tamil Nadu Iyal Isai Nataka Mandram, a unit of the Directorate of Art and Culture, Government of Tamil Nadu, to recognise artists in the state for their achievements.