Joseph S. Wineke (born January 5, 1957) is an American politician. He was chairman of the Democratic Party of Wisconsin from 2005 through 2009. During his term as chair, he saw the Democrats gain full control of Wisconsin's executive and legislative branches for the first time since 1986. Before becoming party chair, he served ten years in the Wisconsin State Assembly and six years in the Wisconsin State Senate, representing suburban areas of Dane, Green, and Rock counties.