Glenn Sholes Grothman (/ˈɡroʊθmən/ GROHTH-mən; born July 3, 1955) is an American attorney and politician serving as the U.S. representative from Wisconsin's 6th congressional district. A member of the Republican Party, he was first elected to his seat in 2014.

Grothman represented the 58th district in the Wisconsin State Assembly from 1993 until 2005 and was vice chair of the Assembly's Republican caucus from 1999 to 2004. He represented the 20th district in the Wisconsin Senate from 2005 to 2015, and was the assistant majority leader from 2011 to 2015.

Grothman graduated from Homestead High School in Mequon in 1973. In 1978, he graduated from the University of Wisconsin–Madison with a BBA degree. He received a Juris Doctor from the University of Wisconsin Law School in 1983, was admitted to the bar, and became an attorney with a firm in West Bend, Wisconsin.^{[citation needed]}

Grothman was elected to the Wisconsin 58th Assembly District in a special election in December 1993 to succeed Mary Panzer, who had won a special election for the state senate. He was reelected five times, from 1994 to 2002. From 1999 to 2004, he was vice chairman of the Republican caucus.

In 2004, Grothman ran for the state senate seat in the 20th district, challenging Panzer, who had by then risen to state senate majority leader, in the Republican primary. The district included the city of West Bend, other parts of Washington County, and parts of Fond du Lac, Dodge, Sheboygan, and Ozaukee Counties.

Running well to Panzer's right, Grothman won the nomination with 79% of the vote to Panzer's 21%. He was unopposed in the general election in the heavily Republican district, and reelected in 2008 and 2012.

From 2007 to 2008, Grothman was the Senate Minority Caucus Chair. He became the assistant Republican leader in 2009, serving as assistant minority leader from 2009 to 2010 and as assistant majority leader from 2011 to 2015.

Grothman was a member of the American Legislative Exchange Council (ALEC).