The president of the United States during World War II was Franklin D. Roosevelt. He served as the 32nd president from 1933 until his death in 1945, leading the nation through both the Great Depression and World War II
. Roosevelt was in office throughout the war, including the critical period after the Japanese attack on Pearl Harbor in December 1941, which led the U.S. to enter the conflict
. He was actively involved in wartime strategy and diplomacy, working closely with military leaders and Allied powers until his death in April 1945, shortly before the war ended
