Who was the president in 1946?

This depends on the country or organization. See related questions or re-ask your question.

US: Franklin Delano Roosevelt

Franklin D. Roosevelt was the 32nd President of the United States serving from

to 1945 April 12 when he died of a brain tumor. He was the longest serving President of the United States and led the US through World War II. Roosevelt was born January 30, 1882 in Hyde Park, New York and died April 12, 1945 in Warm Springs, Georgia.