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For the contiguous U.S., please reference the BIA AIAN Land Area Representation Map here: https://bia-geospatial.maps.arcgis.com/sharing/rest/content/items/01ef53c5a989454abca926f6b5a0584c/data. The purpose of the American Indian and Alaska Native Land Area Representation (AIAN-LAR) Geographic Information System (GIS) dataset is to depict the exterior extent of land held in “trust” or “restricted fee” status by the United States for a tribe(s) and individual Indians of federally recognized Tribes. A tribe is a tribe, band, pueblo, community or other federally acknowledged group of Indians. A federally recognized tribe is an American Indian or Alaska Native tribal entity that is recognized as having a government-to-government relationship with the United States, with the responsibilities, powers, limitations, and obligations attached to that designation, and are eligible for funding and services from the BIA. Furthermore, federally recognized tribes are recognized as possessing certain inherent rights of self-government (i.e., tribal sovereignty) and are entitled to receive certain federal benefits, services, and protections because of their special relationship with the United States. At present, there are 574 federally recognized American Indian and Alaska Native tribes and villages. Not all federally recognized Tribes have a designated land area, land in trust or restricted status and therefore may not have an associated land area represented in the AIAN-LAR. Not all land areas such as public domain allotments are under the jurisdiction or associated with any particular federally recognized tribe. The BIA publishes an updated list of federally recognized tribes in a federal register notice. These data are public information and may be used and interpreted by organizations, agencies, units of government, or other entities. The user, agency or organization has sole responsibility for ensuring the appropriate use, application, integration and republication of these data. The most recent federal register notice is located at: https://www.federalregister.gov/documents/2023/01/12/2023-00504/indian-entities-recognized-by-and-eligible-to-receive-services-from-the-united-states-bureau-of

The Bureau of Indian Affairs Central Office oversees all the regional offices and is also included in this dataset. Agency offices are located within a defined regional boundary, works with the regional offices, and reports to the BIA Deputy Director-Field Operations in Washington, D.C. The twelve regional offices located in the heart of Indian Country. Delivery of program services to the federally recognized tribes and individual Indians and Alaska Natives, whether directly or through contracts, grants or compacts, is administered by the twelve regional offices and 83 agencies that report to the BIA Deputy Director-Field Operations, located in Washington, D.C. Each regional office is headed by a Regional Director who is responsible for all Bureau activities within a defined geographical area except education, law enforcement and functions of an administrative nature. The typical Regional Office includes a Deputy Regional Director for Trust Services and Deputy Regional Director for Indian Services. The twelve regional offices are located in the heart of Indian Country with the agencies located at the reservation level. These regional offices services the needs of specific tribes. The Bureau of Indian Affairs Central Office oversees all the the regional offices and is also included in this file.

Delivery of program services to the federally recognized tribes and individual Indians and Alaska Natives, whether directly or through contracts, grants or compacts, is administered by the twelve regional offices and 83 agencies that report to the BIA Deputy Director-Field Operations, located in Washington, D.C. There is a regional office headed by a Regional Director who is responsible for all Bureau activities within a defined geographical area except education, law enforcement and functions of an administrative nature for each region. The typical Regional Office includes a Deputy Regional Director for Trust Services and Deputy Regional Director for Indian Services. The Deputy Regional Director for Trust Services oversees a staff of specialists responsible for natural resources (water resources, forestry and fire, irrigation and safety of dams), agriculture, (farm, pasture, and range), fish, wildlife and parks and real estate services (land acquisition and disposal land title records office, probate, rights-of-way, and lease/permit). The Deputy Regional Director for Indian Services oversees a staff of specialists responsible for transportation (planning, design, construction, and maintenance) and Indian services (tribal governments, human services, housing improvement).