Nation
Sisseton-Wahpeton Oyate · sisseton-wahpeton oyate · Sisseton-Wahpeton Oyate of the Lake Traverse Reservation, South Dakota · Sisitunwan-Wahpetunwan OyateSisseton-Wahpeton Oyate
Not yet reviewed by this nation. What follows comes from public records and research. It does not speak for the nation.
- Official name
- Sisseton-Wahpeton Oyate of the Lake Traverse Reservation, South Dakota
- Recorded status
- Listed by the Bureau of Indian Affairs (91 FR 4102, January 30, 2026)
- Region
- South Dakota
In the record
The atlas records 1 broken treaty promise involving Sisseton-Wahpeton Oyate: Lake Traverse Reservation (Sisseton-Wahpeton) and DeCoteau v. District County Court (1975). One court case turned on its rights: DeCoteau v. District County Court.
The records group it with Oceti Sakowin (Great Sioux Nation). This nation carries the history of Dakota, Oceti Sakowin (Great Sioux Nation), Sioux (as named in treaty records), Sisseton and Wahpeton in the treaty record.
Written from the records linked here; open any of them for its sources. This is what the United States’ treaty record says, not the nation’s own account.
The record over time
Circles are land the United States recorded as ceded, sized by acres and colored by how it was taken. Bars are treaties, broken promises, court cases and land returns.
Names
Each name shows where it comes from. A nation’s own name is shown as the nation writes it.
Self-names
Land recorded as ceded
This nation carries the history of peoples named in Royce’s schedule. Their record:
- Executive order3 million
Estimate from Royce’s maps; overlapping cessions counted once. Not a survey or legal measure.
4 cessions. Follow Dakota through the years on the map
- Treaty or agreement40 million
- Treaty under documented pressure58 million
- Act of Congress7 million
- Executive order23 million
Estimate from Royce’s maps; overlapping cessions counted once. Not a survey or legal measure.
41 cessions. Follow Sioux (as named in treaty records) through the years on the map
Who is doing the work
This history belongs to living nations. Start with them:
- Cheyenne River Sioux Tribe
- Crow Creek Sioux Tribe
- Flandreau Santee Sioux Tribe of South Dakota
- Assiniboine and Sioux Tribes of the Fort Peck Indian Reservation, Montana
- Lower Brule Sioux Tribe
- Lower Sioux Indian Community in the State of Minnesota
- Oglala Sioux Tribe
- Prairie Island Indian Community in the State of Minnesota
Working with these nations
- Rosebud Sioux Tribe (Sicangu Oyate) Nation government Pe' Sla (1,942 acres, Nov 30, 2012)
- Indian Land Tenure Foundation (ILTF) Native-led Land recovery and control by tribes and individual Indian landowners Website
- Lakota People's Law Project (program of Sacred Defense Fund) Native-led Legal advocacy Give on their site Website
- NDN Collective (LANDBACK Campaign) Native-led LANDBACK campaign (launched 2020; Mount Rushmore closure and return of Black Hills public lands), Indigenous… Give on their site Website
- Cheyenne River Youth Project (CRYP) Native-led Youth programs Website
- Thunder Valley Community Development Corporation (Lakota Land Systems) Native-led Lakota-led regenerative community development on Pine Ridge: Lakota Land Systems Give on their site Website
Native legal and land defense, nationally
- Native American Rights Fund (NARF) Native-led Litigation and legal advocacy for tribal sovereignty, treaty rights, land and resources Give on their site Website
- Decolonizing Wealth Project (Indigenous Earth Fund; California Tribal Land Return) Native-led Reparative philanthropy Give on their site Website
- Honor the Earth Native-led Pipeline resistance, sovereignty, energy justice Give on their site Website
- Indian Law Resource Center Native-led Legal assistance to Indigenous nations to protect lands, resources, treaty and human rights Give on their site Website
Gifts go straight to each organization; this atlas takes nothing. Listing is not endorsement: how organizations are listed.
Connections
These links were matched automatically by name or date and have not yet been reviewed by a person.
Land recorded in this nation’s name 24, matched by the Forest Service, under review
- Land of the Iowa, Medewakanton and others in Iowa and Minnesota, ceded 1830 (area 153)1830
- Land of the Iowa, Medewakanton and others in Iowa, Minnesota and Missouri, ceded 1830 (area 151)1830
- Land of the Iowa, Medewakanton and others in Iowa, recorded 1830 (area 152)1830
- Reservation of the Iowa, Medewakanton and others in Nebraska (area 154)1830
- Reservation of the Iowa, Medewakanton and others in Nebraska (area 155)1830
- Land of the Sioux in Minnesota and Wisconsin, ceded 1837 (area 243)1837
- Land of the Sioux (Sisseton, Wahpeton, Medewakanton, and Wahpekute bands) in Minnesota and South Dakota, ceded 1863 (area 440)1851
- Land of the Sioux (Wahpeton and Sisseton Bands) in Iowa, Minnesota and South Dakota, ceded 1851 (area 289)1851
- Land of the Sioux (Wahpeton and Sisseton Bands) in Minnesota, recorded 1851 (area 414)1851
- Reservation of the Arapaho, Arikara and others in Montana and North Dakota (area 300)1851
- Land of the Sioux (Wahpeton and Sisseton Bands) in North Dakota and South Dakota, ceded 1891 (area 496)1867
- Land of the Sioux, Sisseton in North Dakota and South Dakota, ceded 1872 (area 538)1867
Show all 24
- Reservation of the Sioux (Wahpeton and Sisseton Bands) in North Dakota (area 497)1867
- Land of the Arapaho, Northern Cheyenne and others in several states, ceded 1876 (area 597)1868
- Land of the Sioux in Nebraska, ceded 1875 (area 584)1868
- Land of the Sioux in North Dakota, recorded 1868 (area 516)1868
- Land of the Sioux in North Dakota and South Dakota, ceded 1879 (area 614)1875
- Reservation of the Sioux in North Dakota (area 581)1875
- Land of the Arapaho, Northern Cheyenne and others in South Dakota, ceded 1876 (area 598)1876
- Reservation of the Arapaho, Northern Cheyenne and others in North Dakota (area 599)1876
- Land of the Sioux in South Dakota, recorded 1882 (area 632)1882
- Reservation of the Sioux in Nebraska (area 631)1882
- Land of the Sioux in North Dakota and South Dakota, taken 1884 (area 653)1884
- Land of the Sioux in North Dakota and South Dakota, taken 1889 (area 699)1889
Carries the treaty history of 5
Named in 2
Part of 1
Sources
- swo-nsn.gov/reference work
We proudly represent the Dakota people of the Sisitunwan-Wahpetunwan Oyate.
- govinfo.gov/content/pkg/FR-2026-01-30/html/2026-01899.htmprimary record
Sisseton-Wahpeton Oyate of the Lake Traverse Reservation, South Dakota
- federalregister.gov/documents/full_text/html/2026/01/30/2026-01899.htmlprimary record
Sisseton-Wahpeton Oyate of the Lake Traverse Reservation, South Dakota
- Indian Entities Recognized by and Eligible To Receive Services From the BIA, 91 FR 4102 (Jan. 30, 2026)primary record
Listed in 91 FR 4102 (Jan. 30, 2026).
Research notes
Name as printed in V032.
- Kind
- Nation
- Confidence
- Medium
- Nation review
- Not yet reviewed by this nation