Spark Masayuki Matsunaga (October 8, 1916 – April 15, 1990) was an American politician who served as United States Senator for Hawaii from 1977 until his death in 1990.
A member of the Democratic Party, Matsunaga introduced legislation in the Senate that led to the creation of the Commission on Wartime Relocation and Internment of Civilians and the United States Institute of Peace.