Oklahoma Tribal Statistical Area

Oklahoma Tribal Statistical Area is a statistical entity identified and delineated by federally recognized American Indian tribes in Oklahoma as part of the U.S. Census Bureau's 2010 Census and ongoing American Community Survey. Many of these areas are also designated Tribal Jurisdictional Areas, areas within which tribes will provide government services and assert other forms of government authority.

Source: Wikipedia — Oklahoma Tribal Statistical Area (CC BY-SA 4.0)