Lieutenant General Tran Thanh Phong was an officer of the Army of the Republic of Vietnam. He served as the commander of I Corps, which oversaw the northernmost part of the country, from 20 May 1964 until 30 May of the same year, when he was replaced by Lieutenant General Hoang Xuan Lam. He was one of five different I Corps commanders in two months, as Prime Minister Nguyen Cao Ky struggled to find a leader of whom he approved while the Buddhist Uprising was taking place.