A R Venkatachalapathy is a historian, author and translator from Tamil Nadu, India who writes and publishes in Tamil and English. Currently he is a professor at the Madras Institute of Development Studies (MIDS). He is noted for collecting and publishing the works of Tamil writer Pudhumaipithan. His main areas of research are social and cultural history of colonial Tamil Nadu. Venkatachalapathy worked in the History Department of Manonmaniam Sundaranar University from 1995 to 2000 and that of University of Madras from 2000 to 2001. Since June 2001, he has been a faculty member of the Madras Institute of Development Studies (MIDS).