Dr. A. K. Viswanathan, IPS, is an Indian Police Service officer of the 1990 batch. He is presently in the rank of Director General of Police and serves as the Managing Director of Tamil Nadu Police Housing Corporation Limited, a wholly owned Company of the Government of Tamil Nadu. TNPHC is engaged in various projects related to police housing and infrastructure. He served as the Commissioner of Police, Greater Chennai, from May 2017 to 1 July 2020.