Communist Organisation of India (Marxist–Leninist) was a political organisation in India. COI(ML) was formed in May 1985 through the merger of six different groups;
Kanu Sanyal was elected general secretary of COI(ML). COI(ML) participated in elections.
In 2003 COI(ML) merged with Communist Party of India (Marxist–Leninist) Unity Initiative to form a unified CPI(ML).
COI(ML) held the position that India was multi-national, in which some nationalities dominated the government and suppressed less advanced national groups. The organisation supported the right to self-determination of Jammu & Kashmir, Nagaland and Mizoram.