Ajoy Kumar Mukherjee (15 April 1901 – 27 May 1986) was an Indian independence activist and politician who served three short terms as the fourth and sixth Chief Minister of West Bengal. He hailed from Tamluk, Purba Medinipur district, West Bengal. He was awarded the Padma Vibhushan award in 1977 from Government of India. His brother Biswanath Mukherjee was the husband of Geeta Mukherjee, a communist MP. Ajoy's niece Kalyani (daughter of another brother) was married to Mohan Kumaramangalam and was the mother of Rangarajan Kumaramangalam and Lalitha Kumaramangalam.