First used in 1961, this flag was approved by the Oglala Sioux Tribal Council on March 9, 1962, as the flag of the Oglala Sioux Tribe (OST).
First introduced in 1961, this banner was sanctioned by the Oglala Sioux Tribal Council on March 9, 1962, functioning as the flag of the Oglala Sioux Tribe (OST).