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Present Day Nations
Assiniboine and Sioux Tribes of the Fort Peck Indian Reservation, Montana
Cheyenne River Sioux Tribe of the Cheyenne River Reservation, South Dakota
Crow Creek Sioux Tribe of the Crow Creek Reservation, South Dakota
Flandreau Santee Sioux Tribe of South Dakota
Iowa Tribe of Kansas and Nebraska
Iowa Tribe of Oklahoma
Lower Sioux Indian Community in the State of Minnesota
Omaha Tribe of Nebraska
Otoe-Missouria Tribe of Indians, Oklahoma

Treaty Timeline

Ratified Indian Treaties

Ratified Indian Treaty 87: Oto [Ottoe] - St. Louis, June 24, 1817
Creation Date
National Archives Identifier
100360252
Ratified Indian Treaty Number
Ratified Indian Treaty 140: Oto and Missouri - Fort Atkinson, Council Bluffs, September 26, 1825
Creation Date
National Archives Identifier
169164707
Ratified Indian Treaty Number
Ratified Indian Treaty 159: Sauk and Fox, Sioux (Mdewakanton, Wahpacoota, Wahpeton, Sisseton, Yankton and Santee), Omaha, Iowa, Oto and Missouri - Prairie du Chien, Michigan Territory, July 15, 1830
Creation Date
National Archives Identifier
131516479
Ratified Indian Treaty Number
Ratified Indian Treaty 188: Oto and Missouri - Oto Village, Platte River, September 21, 1833
Creation Date
National Archives Identifier
124087226
Ratified Indian Treaty Number
Ratified Indian Treaty 217: Oto, Missouri, Omaha, and Sioux (Yankton and Santee Bands) - Bellevue, Upper Missouri, October 15, 1836
Creation Date
National Archives Identifier
170231456
Ratified Indian Treaty Number
Ratified Indian Treaty 265: Oto and Missouri - Washington, DC, March 15, 1854
Creation Date
National Archives Identifier
176561682
Ratified Indian Treaty Number
Ratified Indian Treaty 278: Chasta, Scoton, and Umpqua - Council Ground Opposite Mouth of Applegate Creek, Rogue River, Oregon Territory, November 18, 1854
Creation Date
National Archives Identifier
169820715
Ratified Indian Treaty Number
Ratified Indian Treaty 280: Confederated Oto and Missouri - Nebraska City, Nebraska Territory, December 9, 1854
Creation Date
National Archives Identifier
169820753
Ratified Indian Treaty Number

Associated Cessions

Cession 151
Cession 152
Cession 153
Cession 154
Cession 155
Cession 186
Cession 292
Cession 314
Cession 595
Cession 626
Cession 627