Pierre Morpain (c. 1686 - 20 August 1749) was a French ship's captain, privateer, and naval officer. Active in the waters of the West Indies, Morpain is best known for a highly successful privateering career along the coast of Acadia (and later Nova Scotia) during Queen Anne's War and King George's War. He notably made a providential arrival, with supply-laden prizes in tow, at the Acadian capital, Port Royal, not long after the first 1707 siege. In his later years he participated as a military commander in the defence of Fortress Louisbourg during the 1745 siege.