Will D. Mortenson is an American attorney and a member of the South Dakota House of Representatives representing District 24 since January 2021.^[1]

This biography of a living person needs additional citations for verification. (February 2021)

Will Mortenson was born in Pierre, South Dakota and graduated from T. F. Riggs High School. He is an enrolled member of the Cheyenne River Sioux Tribe.^[2]

Mortenson attended University of South Dakota where he received his B.A. He ran the 2010 reelection campaign of Public Utilities Commissioner Dusty Johnson, then worked in the Office of Governor Dennis Daugaard as a policy analyst, before attending the University of Virginia School of Law graduating with his J.D. in 2016.

Mortenson first ran for the South Dakota House of Representatives from District 24 in 2020. He won the primary in June 2020 and the general election on November 3, 2020. In 2021, Mortenson filed articles of impeachment against Attorney General Jason Ravnsborg,^[3] and again in 2022,^[4] leading to Ravnsborg's removal from office.^[5]

In 2022, Mortenson was selected to serve as House Majority Leader by his Republican colleagues in the State House of Representatives.^[6] He is the youngest Republican to serve as House Majority Leader in state history, and the first tribal member to lead a majority caucus.^[7]