Captain Emilio S. Liwanag (March 27, 1911 – April 12, 1967) was an officer in the Philippine Navy during the Second World War and the Korean War.
He started his military career as a 2nd Lieutenant with the 3rd Light Infantry Regiment in the Philippine 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 an 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.
During the Korean War, he served as an Lieutenant Commander - Logistic officer in the Army's 10th Battalion Combat Team as part of the United Nations Forces - Philippine Expeditionary Forces To Korea (PEFTOK) during the 1st year of the war, which was the first deployment of Philippine combat forces under the Republic of the Philippines into foreign soil. Shortly after his return from his 1st tour in Korea, he served a 2nd tour as Liaison officer under the Philippine Navy for the UN Command and Philippine Diplomatic Representative in Tokyo, Japan.