Jacob Sheinkman (December 6, 1926 – January 29, 2004) was an American labor union leader.
In his youth, Sheinkman attended Evander Childs High School and was active in the Workmen's Circle.
He served in the US Navy during World War II, then in the Naval Reserve, where he became a lieutenant.
As leader of the union, he was prominent in opposition to CIA activities in Nicaragua, and was also known for working with companies in an attempt to persuade them to keep jobs in America.
He retired, taking the title of president emeritus of the new union, and instead becoming chair of Americans for Democratic Action.