After Indiaâ s independence in 1947 , Madras Presidency became Madras State . It covered the areas of present day Tamilnadu , coastal parts of Indian states of Andhra Pradesh , northern Kerala , and the southwest of Karnataka . When India became independent in 1947 , Madras Presidency became the Madras State , comprising present-day Tamil Nadu , coastal Andhra Pradesh , northern Kerala , and the southwest coast of Karnataka .