,There are twelve Bureau of Indian Affairs Regions: Alaska, Eastern, Eastern Oklahoma, Great Plains, Midwest, Navajo, Northwest, Pacific, Rocky Mountain, Southern Plains, Southwest, Western. The BIA RGCs Function as the regional GIS liaisons for Tribal GIS programs.Employees of Federally recognized Tribes,BIA Employees, Federal agencies seeking geospatial resources concerning Federally recognized Tribesshould contact the BIA-RGC for regionally specific geospatial resources.,

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In Oklahoma, historic depictions of the land areas representations, as described in 1867-1870, were developed and called Tribal Statistical Areas (TSA) in the AIAN-LAR. These areas are similar to the Bureau of Census Oklahoma Tribal Statistical Areas (TSA) which are areas used for the collection, tabulation and presentation of decennial census data for the 36 Federally-recognized American Indian Tribes located in the state. Reservation boundary data is limited in authority to those areas where there has been settled Congressional definition or final judicial interpretation of the boundary. Absent settled Congressional definition or final judicial interpretation of a reservation boundary, the Bureau of Indian Affairs (BIA) recommends consultation with the appropriate tribe and then the BIA to obtain interpretations of the reservation boundary. Reservation boundary data is limited in authority to those areas where there has been settled Congressional definition or final judicial interpretation of the boundary. Absent settled Congressional definition or final judicial interpretation of a reservation boundary, the BIA recommends consultation with the appropriate Tribe and then the BIA to obtain interpretations of the reservation boundary. The land areas and their representations are compilations defined by the official land title records of the BIA which include treaties, statutes, Acts of Congress, agreements, executive orders, proclamations, deeds and other land title documents. The trust, restricted, and mixed ownership land area shown here, are suitable only for general spatial reference and do not represent the federal government’s position on the jurisdictional status of Indian country. Ownership and jurisdictional status is subject to change and must be verified with plat books, patents, and deeds in the appropriate federal and state offices.

,There are 187 Bureau-funded elementary and secondary schools on 64 reservations in 23 states, serving approximately 40,000 Indian students. Of these, 58 are BIE-operated and 129 are tribally controlled under BIE contracts or grants. The Bureau also funds or operates off-reservation boarding schools and peripheral dormitories near reservations for public school students. The BIE also serves American Indian and Alaska Native post-secondary students through higher education scholarships and support funding for tribal colleges and universities. The BIE directly operates two post-secondary institutions: the Haskell Indian Nations University (HINU) in Lawrence, Kansas, and the Southwestern Indian Polytechnic Institute (SIPI) in Albuquerque, New Mexico. Native American boarding schools and dormitories were established in the United States during the late 19th and early 20th centuries. The land where the schools are located is administered by the Bureau of Indian Affairs while the facilities and there operation is under the jurisdiction of the Bureau of Indian Education. As stated in Title 25 CFR Part 32.3, BIE’s mission is to provide quality education opportunities from early childhood through life in accordance with a tribe’s needs for cultural and economic well-being, in keeping with the vast diversity of Indian tribes and Alaska Native villages as distinct cultural and governmental entities. Further, the BIE is to manifest consideration of the whole person by considering the individual's spiritual, mental, physical, and cultural aspects within his or her family and tribal or village context. The BIE school system employs thousands of teachers, administrators and support personnel, while many more work in tribal school systems.,