Harold Dewey Smith (June 6, 1898 – January 23, 1947) was an American civil servant who served as director of the United States Bureau of the Budget (now the Office of Management and Budget) during the Second World War.

In 1939, he was selected by President Franklin D. Roosevelt to serve as the Director of the Bureau of the Budget.

Smith served in that position for seven years, during which time he handled the enormous expansion of spending resulting from American participation in the Second World War.

He resigned from the position in June 1946 to become the vice president of the International Bank for Reconstruction and Development,[2] but died shortly thereafter in Culpeper, Virginia.

After his death, his widow donated all of his papers to the Franklin D. Roosevelt Presidential Library and Museum.