Henry John Muller Jr. (April 7, 1917 – January 31, 2022) was an American soldier who served during World War II in the United States Army with the 11th Airborne Division between 1944 and 1945. During the Vietnam War, he served as assistant division commander of the 101st Airborne Division and as deputy senior adviser to the Vietnamese I Corps commander, Lieutenant General Lam. Muller served as the assistant division commander of the 101st until September 12, 1969.