Kevin Killer (Oglala Sioux) (born May 4, 1979) is an activist, Native American politician, and president of the Oglala Sioux Tribe. He previously served as a Democratic member of the South Dakota House of Representatives from 2009 to 2017 and the South Dakota Senate from 2017 to 2019, representing the 27th district. He lives in Pine Ridge, South Dakota. In November 2020, he was elected tribal president of the Oglala Sioux Tribe. He was defeated during his 2022 re-election bid by Frank Star Comes Out.