The reservation occupies the easternmost 60 percent of Charles Mix County in southeastern South Dakota, United States and abuts the Missouri River along its southwest border. It has a land area of 665.712 sq mi (1,724.186 km2) and a total area (land and water) of 684.406 sq mi (1,772.604 km2), and a resident population of 6,500 persons as of the 2000 census. The population as of the 2010 census was 6,465 inhabitants. After the Osage Indian Reservation, it is the second-largest Indian reservation that is located entirely within one county.
The largest community on the reservation is the city of Wagner, which is the location of the tribal headquarters. The blues-rock group Indigenous is originally from this community, as is early 20th-century author and activist Zitkala-Sa.
Tribal information
Reservation: Diminished Yankton Reservation; part of Charles Mix County
Division: Dakota (Yankton)
Bands: Ihanktonwan
Land Area: Approximately 438,100 acres total (425,900 land and 12,200 water)
Tribal Headquarters: Wagner, SD
Time Zone: Central
Traditional Language: Nakota/Dakota
Enrolled members living within diminished area: 6,500 in 2000; 6,465 in 2010
Major Employers: Fort Randall Casino, Indian Health Service, tribal office, Bureau of Indian Affairs, Marty Indian School
Website: https://www.yanktonsiouxtribe.net/
Government
Charter: None; Constitution and Bylaws: Yes - non-IRA
Date Approved: April 24, 1963
Name of Governing Body: Yankton Sioux Tribal Business and Claims Committee
Number of committee members: (5) five committee members
Dates of Constitutional amendments: March 20, 1975
Number of Executive Officers: (4) Chairman, Vice-Chairman, Secretary, Treasurer
Elections
Primary election is in July and the General is every two years on the first Thursday in September. Executive officers are elected at large and serve two year terms in office.
Number of Election districts or communities: 5
Meetings
Regular business meeting are held once a week usually on Tuesday. An annual General Council Meeting is set for the third Tuesday in August each year.
Quorum number: 5 members
Notable leaders, past and present
Smutty Bear in 1857
Chief Struck by the Ree (1804–1888, Yankton) –As chief, Struck by the Ree managed to befriend the whites, yet remain dedicated and loyal to his people. He died in 1888 at Greenwood.
Chief Running Bull, Tatankaiyanka (1826–1900, Yankton) – He succeeded Chief Struck by the Ree. Running Bull signed the Treaty of 1858. He was the son of Zuyesa ("Warrior"), who had signed the Treaty of 1837, ceding tribal lands east of the Mississippi to the U.S.
Chief Smutty Bear, Mato Sabi Ceya (1790?–1865, Ihanktonwan) – his name was said to mean "He Paints Himself Dark Like A Bear". He signed four treaties with the US: the Treaty of 1825,[1] the Fourth Treaty of Prairie du Chien of 1830,[2] the Fort Laramie Treaty of 1851,[3] and the Treaty of 1858.[4] He was a strong defender and believer in tribal sovereignty. Spellings of his name varied: Maw-too-an-be-kin, Matto-sa-becha, Mak-toe-sah-bi-chis, and Ma-to-sa-be-che-a.
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