The Ramnad riots or the Mudukulathur riots were a series of violent clashes that occurred between July and September 1957 in the Ramnad district and in southern Tamil Nadu, India. The violence was between Thevars supporting the Forward Bloc, and pro-Congress Dalit Pallars, and was triggered by a by-election held in the aftermath of the Madras Legislative Assembly elections of earlier that year. 42 Dalits were killed during the riots.