Arun Kumar Roy (1928/1929 – 21 July 2019) was an Indian politician, who served both as a Member of Parliament and a Member of Legislative Assembly.
He was born in a small village in Rajshahi district of the then East Bengal, during the British Raj to anti-British activist parents.
Roy, a former member of the Communist Party of India (Marxist), entered politics after being dismissed from his job as chemical engineer in a company for supporting a workers' strike in 1966–1967.
Later in his political career, Roy founded the Marxist Co-ordination Committee, a political party based in the coal mining region of Dhanbad, Jharkhand.