Karl Yoneda (1906-1999) was a Japanese-American union organizer and activist. He was a World War II veteran, and helped to found the International Longshore and Warehouse Union. During the 1920s, he became involved with the Communist Party, and changed his name to Karl in honor of Karl Marx. His family was incarcerated at a California concentration camp in 1942. Even after his retirement in 1972, he continued his membership with the Communist Party.