Joseph Anthony Plouff (born February 8, 1950) is an American Democratic politician from Menomonie, Wisconsin. He served four terms in the Wisconsin State Assembly, representing the 29th Assembly district from 1997 to 2005. He also served one year on the City Council of Menomonie.
Born in De Pere, Wisconsin, Plouff received his bachelor's degree from the University of Wisconsin–Eau Claire and his master's degree from the University of Wisconsin–Stout. Plouff also served in the United States Army. He served on the Menomonie, Wisconsin Common Council and the Dunn County, Wisconsin Board of Supervisors. Plouff served in the Wisconsin State Assembly from 1997 until 2005, when he was defeated for re-election in 2004.
Plouff was the Democratic nominee for the 92nd assembly district in 2024.