Jeffrey Lynn Viken (born August 8, 1952) is a former United States district judge of the United States District Court for the District of South Dakota.

Jeffrey Lynn Viken
Chief Judge — U.S. District Court for the District of South Dakota
Born 1952 in Huron, SD
FJC ID: 3221
- Gender
- Male
- Race
- White
Prior employment
Federal public defender · 2003–2009- Private practice, Rapid City, South Dakota1981–2003
District of South DakotaAssistant U.S. attorney · 1977–1981- ↳acting U.S. attorney · 1981
Appointments
2009–2023 · Appointed by Barack Obama (Democratic)Term ended: Retirement
2009–present
Education

- University of South DakotaB.A. · 1974