Jeffrey L. Viken

Jeffrey Lynn Viken (born August 8, 1952) is a United States District Judge of the United States District Court for the District of South Dakota. He has been the federal public defender for North Dakota and South Dakota.

Born in Huron, South Dakota, Viken earned a Bachelor of Arts degree from the University of South Dakota in May 1974 and a Juris Doctor from the University of South Dakota School of Law in May 1977. He did not take the bar exam as he was admitted to the South Dakota bar under diploma privilege.

From 1977 until 1981, Viken served as an Assistant United States Attorney for the District of South Dakota and in 1981 became the Acting United States Attorney for the District of South Dakota. From 1981 to 1982, Viken was a partner in the Rapid City, South Dakota law firm of Finch, Viken & Viken, and then from 1981 to 1992, Viken was a partner in the Rapid City firm of Finch, Viken, Viken & Pechota. From 1992 until 2003, Viken served as a partner in the Rapid City law firm of Viken, Viken, Pechota, Leach & Dewell, LLP.

In 2003, Viken was appointed federal public defender for the District of South Dakota by the United States Court of Appeals for the Eighth Circuit. In 2005, the Eighth Circuit appointed Viken the federal public defender for the District of North Dakota as well to lead a combined-district organization for both North Dakota and South Dakota. https://www.fjc.gov/history/judges/viken-jeffrey-lynn

On June 25, 2009, President Barack Obama nominated Viken to a vacant seat on the United States District Court for the District of South Dakota that was created when Judge Lawrence L. Piersol took senior status. The United States Senate confirmed Viken in a 99–0 vote on September 29, 2009. He received his commission the following day. He served as Chief Judge from 2013–2019.