Prasanna Gunawardena () is a Sri Lankan politician, former mayor of Colombo and a former presidential adviser. He is a Charted Architect and urban planner by profession.
Born 23 August 1946 to Philip Gunawardena and Kusuma Amarasinha, Prasanna is brother of Indika (ex-cabinet minister), Lakmali (State Award Winner of literature), Dinesh (cabinet minister and leader of the house â Parliament), and Gitanjana (ex-minister).