Rangarajan is an Indian surname and may refer to
C. Rangarajan, Indian economist, former Governor of the Reserve Bank of India G. N. Rangarajan, Indian film director and writer Mahesh Rangarajan, Indian author and historian Manakkal Rangarajan, Carnatic singer from India Ra. Ki. Rangarajan, Indian writer S. Rangarajan, Indian journalist Sujatha Rangarajan, Indian writer and novelist Swarnalatha Rangarajan, Indian academic and writer Rangarajan Kumaramangalam, Indian politician Sudhangan, Indian journalist and editor also known by his birth name Rangarajan