Benjamin Atwood Smith II (March 26, 1916 – September 26, 1991) was an American politician who served as a member of the United States Senate from December 1960 until November 1962.

Smith served in the United States Navy for four years during World War II.

For many years Smith was the chief executive of his family's business, the Merchants Box Company in Gloucester.

Kennedy, who had been reelected to a second Senate term of six years in 1958, advised then-Governor Foster Furcolo to appoint Smith to fill the vacated seat "in the interest of promoting party unity."

In 1963, President Kennedy named Smith as the chairman of the U.S. delegation to the North Pacific Fisheries Conference involving the United States, the Soviet Union, Canada and Japan.