Donald Selwyn Slaiman (March 18, 1919 – October 24, 2000) was an American labor unionist and political activist.
Born in New York City, Slaiman studied at the City College of New York, then served with the Army Corps of Engineers during World War II.
After the war, he became a labor organizer in Buffalo, New York, and was a leader of the unsuccessful United Auto Workers strike of 1949.
In that role, he focused on ensuring that the Civil Rights Act of 1964 was implemented, and led the federation's delegation to one of the Selma to Montgomery marches.
He held the post until the mid-1990s, when he became less active due to poor health, and was instead made chairman of the political organization.