The Kiowa are a nation of American Indians and indigenous people of the Great Plains. They migrated from the northern plains to the southern plains in the late 17th century. In 1867, the Kiowa moved to a reservation in southwestern Oklahoma

Oklahoma

Oklahoma is a state located in the South Central region of the United States of America. With an estimated 3,751,351 residents as of the 2010 census and a land area of 68,667 square miles , Oklahoma is the 28th most populous and 20th-largest state...

. Today, they are a federally recognized tribe, the Kiowa Tribe of Oklahoma, with over 11,500 members.
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Kiowa call themselves Kaui-gu.