In Tamil Nadu, India, families of striking Dalit workers were massacred by a gang, allegedly led by their landlords.

Tamil Nadu is the southernmost state of India. The tenth largest Indian state by area and the sixth largest by population, Tamil Nadu is the home of the Tamil people, who speak the Tamil language—the state's official language and one of the longest surviving classical languages of the world. The capital and largest city is Chennai.

Dalit is a term used for untouchables and outcasts, who represented the lowest stratum of the castes in the Indian subcontinent. They are also called Harijans. Dalits were excluded from the fourfold varna of the caste hierarchy and were seen as forming a fifth varna, also known by the name of Panchama.

The Kilvenmani massacre was an incident in Kizhavenmani village, Nagapattinam district of Tamil Nadu state in India on 25 December 1968 in which a group of around 44 people, the families of striking Dalit village labourers, were murdered by a gang, allegedly led by their landlords. The chief accused was Gopalakrishnan Naidu.