N. G. Ranga came from an agricultural background in Tamilnad, South India. His mother died when he was eight and although his family were not well off, his father sent him to study in England in 1920. Ranga travelled on the S. S. Loyalty with more than 300 other Indian students and the chemist, P. C. Ray. Ranga arrived in England without a place at university and went to live in Botley, an Oxford village, as he studied for the Responsions (entrance exams).
Ranga gained a place at Oxford University and soon became involved in the Lotus and Majlis societies. Ranga was influenced by the growth of socialism and was a member of the Oxford Labour Club. Although Ranga had considered joining the ICS, he decided against this as Indian politics were at the forefront of his mind. He embarked on a research degree in Economics. His wife later joined him and studied at the Ruskin School of Art.
Ranga was heavily influenced by M. K. Gandhi and village politics. Upon his return to India he became involved in the kisan movement. In 1957, Ranga became a Congress MP, but then founded the Swatantra Party in 1959. The Party was designed as a free-market liberal party that broke away from Nehru's socialist vision. Ranga retired from parliament in 1991.