Mahendralal Sarkar CIE (other spellings: মহেন্দ্রলাল সরকার, Mahendra Lal Sarkar, Mahendralal Sircar, Mahendralal Sircir; 2 November 1833 – 23 February 1904) was a Bengali medical doctor (MD), the second MD graduated from the Calcutta Medical College, social reformer, and propagator of scientific studies in nineteenth-century India. He was the founder of the Indian Association for the Cultivation of Science.