Captain Emilio S. Liwanag (March 27, 1911 – April 12, 1967) was an officer in the Philippine Navy who served during the Second World War and the Korean War. He started his military career as a 3rd Lieutenant with the 3rd Light Infantry Regiment in the Philippine Commonwealth Army after graduation from the Philippine Military Academy. He joined the Offshore Patrol unit of the U.S. Army Forces in the Far East (USAFFE) as a 1st Lieutenant during the Second World War and was involved in the Battle of Bataan and during the country's liberation in the Battle of Manila.