Saroj Dutta (March 13, 1914 – August 5, 1971) popularly known comrade SD, was an Indian communist intellectual and poet, active in the Naxalite movement in West Bengal in the 1960s. He was the first West Bengal state secretary of Communist Party of India (Marxist-Leninist) (CPI(ML)). He also remained editor-in-chief of the Amrita Bazar Patrika during the 1940s. It is commonly thought that he was killed in a police encounter on August 5, 1971, but till now he was missing in police and state records.