Archie Pratt was last hereditary Chief for Oak River Indian Reserve.
The first ever recorded election for Oak River Indian Reserve, now known as Sioux Valley Dakota Nation, was in 1952.
1952-1954
Chief: Archie Pratt
Councillor: Albert Ironman
Councillor: Morris Kiyewakan
Councillor: Alfred Tacan
Councillor: Eli Taylor
1954-1956
Chief: Eli Taylor
Councillor: Willie Antoine
Councillor: Daniel Wanbdiska
Councillor: Isaac Wanbdiska
Councillor: Phillip Wasicuna
1956-1958
Chief: Eli Taylor
Councillor: Jacob Blacksmith
Councillor: Phillip Wasicuna
Councillor: Eric Mckay
Councillor: Zephrin Sioux
Councillor: Alfred Tacan
1958-1960
Chief: Edward Mazawasicuna
Councillor: Albert Elk
Councillor: Herbert Hall
Councillor: Lloyd Ross
Councillor: John Sioux
Councillor: Peter Whitecloud
1960-1962
Chief: John Sioux
Councillor: Jacob Blacksmith
Councillor: Jim Blacksmith
Councillor: Lloyd Ross
Councillor: Norris Tacan
Councillor: Peter Whitecloud
1962-1964
Chief: John Sioux
Councillor: Demas Dowan
Councillor: Herman Hapa
Councillor: Eva McKay
Councillor: Albert Taylor Sr.
Councillor: Eli Taylor
1964-1966
Chief: Jim Blacksmith
Councillor: Jacob Blacksmith
Councillor: Herbert Hall
Councillor: Eva McKay
Councillor: Donald Pratt
Councillor: Lloyd Ross
Councillor: Eli Taylor
1966-1968
Chief: John Sioux
Councillor: Albert Elk
Councillor: Eva McKay
Councillor: Donald Pratt
Councillor: Amos Tacan-Williams
Councillor: Albert Taylor Sr.
Councillor: Eli Taylor
1968-1970
Chief: Peter Whitecloud (elected to replace John Sioux who resigned)
Councillor: Phillip Chaske
Councillor: Ivan Hall
Councillor: John Johnson Sr.
Councillor: Abraham Mini
Councillor: Felix Mini
Councillor: Amos Tacan-Williams
Councillor: Edwin Taylor
Councillor: Aurthur Wambidee
1970-1972
Chief: Vernon Mazawasicuna (elected to replace Peter Whitecloud who resigned)
Councillor: Jacob Blacksmith
Councillor: Wilfred Hapa
Councillor: John Johnson Sr.
Councillor: Eva McKay
Councillor: Alfred Tacan
Councillor: Victor Tacan
Councillor: Aurthur Wambidee
1972-1974
Chief: Michael Hotain
Councillor: Phillip Chaske
Councillor: Leslie Hotain
Councillor: Clifford Mazawasicuna
Councillor: Russel Merrick
1974-1976
Chief: Franklin H. McKay
Councillor: Phillip Chaske
Councillor: Victor Chaske
Councillor: Brian Pratt
Councillor: Wayne Wasicuna
1976-1978
Chief: Russell Merrick (elected to replace Walter Noel who resigned)
Councillor: Clarence Blacksmith
Councillor: Rose Essie
Councillor: Marina Tacan
Councillor: Peter Whitecloud
1978-1980
Chief: Waldron Essie (appointed by Council to replace John Sioux who resigned)
Councillor: Hector Bunn
Councillor: Osborne Pratt
Councillor: Winston Williams
1980-1982
Chief: Robert Wasicuna
Councillor: Ronald Hall
Councillor: Gordon Taylor
Councillor: Aurthur Wambidee
1982-1984
Chief: M. Allan Pratt
Councillor: Robert Bone
Councillor: Michael Hotain
Councillor: Clifford Mazawasicuna
Councillor: John Sioux
1984-1986
Chief: M. Allan Pratt
Councillor: Robert Bone
Councillor: Michael Hotain
Councillor: Franklin McKay
Councillor: Robert Sioux
1986-1988
Chief: Robert Bone
Councillor: Roy Dowan
Councillor: James Ironman
Councillor: Eli Tacan
Councillor: Dwayne Whitecloud
1988-1990
Chief: Robert Bone
Councillor: Harold Blacksmith
Councillor: Waldron Essie
Councillor: John Sioux
Councillor: Dwayne Whitecloud
1990-1992
Chief: Robert Bone
Councillor: Oswald McKay (elected after Harold Blacksmith resigned)
Councillor: John Sioux
Councillor: Eugene Taylor
Councillor: Edward Wanbdiska
1992-1994
Chief: Robert Bone
Councillor: Ivan P. Ironman
Councillor: R. Terry Pratt
Councillor: Barbara Turenne
Councillor: Dwayne Whitecloud
In 1994, Sioux Valley Dakota Nation elections were held under Band custom Code, SVDN is no longer under the Indian Act Section 74
1994-1996
Chief: Ronald Hall
Councillor: Ivan P. Ironman
Councillor: R. Terry Pratt
Councillor: Percy Tacan
Councillor: Vincent Tacan
Councillor: Raymond Wasicuna
1996-1998
Chief: Ivan P. Ironman
Councillor: Harold Blacksmith
Councillor: R. Terry Pratt
Councillor: Andrew Sioux
Councillor: Barbara Turenne
Councillor: Kenneth Whitecloud
1998-2000
Chief: Kenneth Whitecloud
Councillor: Katherine Hockley
Councillor: Ken McKay
Councillor: Andrew Sioux
Councillor: Anthony D. Tacan
Councillor: Dwayne Whitecloud
2000-2002
Chief: Kenneth Whitecloud
Councillor: Francis Elk
Councillor: Ronald Hall
Councillor: Anthony D. Tacan
Councillor: Dwayne Whitecloud
2002-2004
Chief: Katherine Whitecloud (elected after Kenneth Whitecloud resigned)
Councillor: Craig Blacksmith (elected after Katherine Whitecloud was elected to Chief)
Councillor: Francis Elk
Councillor: Melissa Hotain
Councillor: Ken McKay
Councillor: Anthony D. Tacan
Custom Code 2003 Implemented
2004-2006
Chief: Vincent Tacan
Councillor: Lee Baker (passed away during term in office)
Councillor: Francis Elk
Councillor: Travis Mazawasicuna
Councillor: C. William McKay
Councillor: Franklin B. McKay
2006-2008
Chief: Kenneth Whitecloud
Councillor: Donna Elk
Councillor: Francis Elk
Councillor: Warren Hotain
Councillor: Denise McKay
Councillor: Neil Wanbdiska
2008-2010
Chief: Donna Elk
Councillor: Rose Essie (elected in bi-election held for vacant position)
Councillor: Ivan Ironman
Councillor: Anthony D. Tacan
Councillor: Olga Wasteste
Councillor: Neil Wanbdiska
2010-2012
Chief: Vincent Tacan
Councillor: Jennifer Bone
Councillor: Ivan Ironman
Councillor: Anthony D. Tacan
Councillor: Shane Taylor
Councillor: Neil Wanbdiska
2012-2014
Chief: Vincent Tacan
Councillor: Jennifer Bone
Councillor: Eleanore Elk
Councillor: Ivan Ironman
Councillor: Franklin H. McKay
Councillor: Anthony D. Tacan
2014-2016
Chief: Vincent Tacan
Councillor: Jennifer Bone
Councillor: Anthony D. Tacan
Councillor: Mark Hall
Councillor: Franklin H. McKay (1 year term – Custom Code 03)
Councillor: Misty Wasteste (1 year term – Custom Code 03)
2015-2016
Councillor: Eleanore Elk (Bi-Election 03 Custom Code)
Councillor: Wilson Kennedy (Bi-Election 03 Custom Code)
Sioux Valley Dakota Nation Election Law implemented passed on November 27, 2016. 3 year terms to be implemented after transitional 2.5 year term. SVDN Elections to be held every 3 years in accordance with the SVDN Election Law.
2016-2018
Chief: Vincent Tacan
Councillor: Jennifer Bone
Councillor: Eleanore Elk
Councillor: Wilson Kennedy
Councillor: Anthony D. Tacan
Councillor: Elton Taylor
2018-2021
Chief: Jennifer Bone
Councillor: Eleanore Elk
Councillor: R. Jamie Hall
Councillor: Evelyn Pratt
Councillor: Anthony D. Tacan
Councillor: Elton Taylor
Sioux Valley Dakota Nation Election Law #2015.11.27-01 changed to 2 years terms.
2021-2023
Chief: Jennifer Bone
Councillor: Jon Bell
Councillor: Michelle Rosmus
Councillor: Rusty Taylor
Councillor: Anthony D. Tacan
Councillor: Tim Whitecloud
