Kenneth Ray Plum (born November 3, 1941) is a Democratic member of the Virginia House of Delegates, representing the 36th District since 1982.
He earlier served from 1978 through 1980.
His district includes a large part of Fairfax County, including the entirety of the town of Reston.Plum was selected as chair of the House Democratic caucus on January 14, 2009.
He was previously a chair of the Democratic Party of Virginia.