Sithamalli Govindan Murugaiyan (15 July 1931 – 5 January 1979), usually called S.G.
Murugaiyan (Tamil: ???.??.?????????), was a communist politician in Tamil Nadu, India.
S.G.
Murugaiyan was a prominent leader of struggles of Dalits in Mannargudi taluk, and became the first Dalit in the state to be elected as revenue block chairman.