,Surface trust lands are displayed and summarized in a table by Tribal entity. A Tribal entity may be a federally recognized tribe or a constituent component of a federally recognized tribe. For each Tribal entity in the table the total trust acreage is given as well as the breakout of tribal trust and allotted trust acreage. Tribal trust lands are those where a tribe is the named landowner, and the tribe has a full percentage ownership interest in the tract division. Allotted trusts consist of two definitions of allotted. An allotted land may be a land where the tribe is the named landowner but only has a partial percentage interest in the tract division. An allotted land may also be one in which an individual associate of a tribe has any percentage ownership. A trust land would be any tribal, or allotted land that can be tied back the tribal entity. For any regional trust lands that do not have an identified entity interest or have a split entity interest that does not have a clear definition of the split, the trust lands are summarized in a row labeled undesignated. The Land Area Representation (LAR), BIA Regional Boundaries, Regional and BIA offices, as well as tribal entities without land are added in each region and adjacent territories when suitable to provide context. The tribal entity names are given by common use names instead of federal register names and may be further split into subdivisions within the recognized tribe. The Land Area Representation (LAR) is a combined dataset which creates a union of trust lands and reservation extents. The polygons are organized around tribal divisions and groupings and lack disambiguation between the trust land and reservation extent components. Due to the static creation date the LAR may not match different sources for components of the LAR. The Trust Asset and Accounting Management System (TAAMS) which is the system of record for trust lands is the source for records used in acreage calculations. (Last calculated May 2025) Tribal lands are lands where the tribe is the named landowner, and the tribe has a full percentage ownership interest of a tract division. Allotted lands are those in which the tribe is the named landowner but is a partial percentage ownership interest of a tract division, or an allotment may be individually owned by a tribe associate with any percentage ownership interest in a tract division. Trust lands are the summed totals of tribal and allotted interests for a tribal entity. LAR – Land Area Representation is a combined dataset which creates a union of trust lands and reservation extents. The polygons are organized around tribal divisions and groupings and lack disambiguation between the trust land and reservation extent components. TAAMS – The Trust Asset and Accounting Management System which is the system of record for trust land transactions and the source for records used in acreage calculations.,

,Surface trust lands are displayed and summarized in a table by Tribal entity. A Tribal entity may be a federally recognized tribe or a constituent component of a federally recognized tribe. For each Tribal entity in the table the total trust acreage is given as well as the breakout of tribal trust and allotted trust acreage. Tribal trust lands are those where a tribe is the named landowner, and the tribe has a full percentage ownership interest in the tract division. Allotted trusts consist of two definitions of allotted. An allotted land may be a land where the tribe is the named landowner but only has a partial percentage interest in the tract division. An allotted land may also be one in which an individual associate of a tribe has any percentage ownership. A trust land would be any tribal, or allotted land that can be tied back the tribal entity. For any regional trust lands that do not have an identified entity interest or have a split entity interest that does not have a clear definition of the split, the trust lands are summarized in a row labeled undesignated. The Land Area Representation (LAR), BIA Regional Boundaries, Regional and BIA offices, as well as tribal entities without land are added in each region and adjacent territories when suitable to provide context. The tribal entity names are given by common use names instead of federal register names and may be further split into subdivisions within the recognized tribe. The Land Area Representation (LAR) is a combined dataset which creates a union of trust lands and reservation extents. The polygons are organized around tribal divisions and groupings and lack disambiguation between the trust land and reservation extent components. Due to the static creation date the LAR may not match different sources for components of the LAR. The Trust Asset and Accounting Management System (TAAMS) which is the system of record for trust lands is the source for records used in acreage calculations. (Last calculated May 2025) Tribal lands are lands where the tribe is the named landowner, and the tribe has a full percentage ownership interest of a tract division. Allotted lands are those in which the tribe is the named landowner but is a partial percentage ownership interest of a tract division, or an allotment may be individually owned by a tribe associate with any percentage ownership interest in a tract division. Trust lands are the summed totals of tribal and allotted interests for a tribal entity. LAR – Land Area Representation is a combined dataset which creates a union of trust lands and reservation extents. The polygons are organized around tribal divisions and groupings and lack disambiguation between the trust land and reservation extent components. TAAMS – The Trust Asset and Accounting Management System which is the system of record for trust land transactions and the source for records used in acreage calculations.,

,Surface trust lands are displayed and summarized in a table by Tribal entity. A Tribal entity may be a federally recognized tribe or a constituent component of a federally recognized tribe. For each Tribal entity in the table the total trust acreage is given as well as the breakout of tribal trust and allotted trust acreage. Tribal trust lands are those where a tribe is the named landowner, and the tribe has a full percentage ownership interest in the tract division. Allotted trusts consist of two definitions of allotted. An allotted land may be a land where the tribe is the named landowner but only has a partial percentage interest in the tract division. An allotted land may also be one in which an individual associate of a tribe has any percentage ownership. A trust land would be any tribal, or allotted land that can be tied back the tribal entity. For any regional trust lands that do not have an identified entity interest or have a split entity interest that does not have a clear definition of the split, the trust lands are summarized in a row labeled undesignated. The Land Area Representation (LAR), BIA Regional Boundaries, Regional and BIA offices, as well as tribal entities without land are added in each region and adjacent territories when suitable to provide context. The tribal entity names are given by common use names instead of federal register names and may be further split into subdivisions within the recognized tribe. The Land Area Representation (LAR) is a combined dataset which creates a union of trust lands and reservation extents. The polygons are organized around tribal divisions and groupings and lack disambiguation between the trust land and reservation extent components. Due to the static creation date the LAR may not match different sources for components of the LAR. The Trust Asset and Accounting Management System (TAAMS) which is the system of record for trust lands is the source for records used in acreage calculations. (Last calculated May 2025) Tribal lands are lands where the tribe is the named landowner, and the tribe has a full percentage ownership interest of a tract division. Allotted lands are those in which the tribe is the named landowner but is a partial percentage ownership interest of a tract division, or an allotment may be individually owned by a tribe associate with any percentage ownership interest in a tract division. Trust lands are the summed totals of tribal and allotted interests for a tribal entity. LAR – Land Area Representation is a combined dataset which creates a union of trust lands and reservation extents. The polygons are organized around tribal divisions and groupings and lack disambiguation between the trust land and reservation extent components. TAAMS – The Trust Asset and Accounting Management System which is the system of record for trust land transactions and the source for records used in acreage calculations.,

,Surface trust lands are displayed and summarized in a table by Tribal entity. A Tribal entity may be a federally recognized tribe or a constituent component of a federally recognized tribe. For each Tribal entity in the table the total trust acreage is given as well as the breakout of tribal trust and allotted trust acreage. Tribal trust lands are those where a tribe is the named landowner, and the tribe has a full percentage ownership interest in the tract division. Allotted trusts consist of two definitions of allotted. An allotted land may be a land where the tribe is the named landowner but only has a partial percentage interest in the tract division. An allotted land may also be one in which an individual associate of a tribe has any percentage ownership. A trust land would be any tribal, or allotted land that can be tied back the tribal entity. For any regional trust lands that do not have an identified entity interest or have a split entity interest that does not have a clear definition of the split, the trust lands are summarized in a row labeled undesignated. The Land Area Representation (LAR), BIA Regional Boundaries, Regional and BIA offices, as well as tribal entities without land are added in each region and adjacent territories when suitable to provide context. The tribal entity names are given by common use names instead of federal register names and may be further split into subdivisions within the recognized tribe. The Land Area Representation (LAR) is a combined dataset which creates a union of trust lands and reservation extents. The polygons are organized around tribal divisions and groupings and lack disambiguation between the trust land and reservation extent components. Due to the static creation date the LAR may not match different sources for components of the LAR. The Trust Asset and Accounting Management System (TAAMS) which is the system of record for trust lands is the source for records used in acreage calculations. (Last calculated May 2025) Tribal lands are lands where the tribe is the named landowner, and the tribe has a full percentage ownership interest of a tract division. Allotted lands are those in which the tribe is the named landowner but is a partial percentage ownership interest of a tract division, or an allotment may be individually owned by a tribe associate with any percentage ownership interest in a tract division. Trust lands are the summed totals of tribal and allotted interests for a tribal entity. LAR – Land Area Representation is a combined dataset which creates a union of trust lands and reservation extents. The polygons are organized around tribal divisions and groupings and lack disambiguation between the trust land and reservation extent components. TAAMS – The Trust Asset and Accounting Management System which is the system of record for trust land transactions and the source for records used in acreage calculations.,

,Surface trust lands are displayed and summarized in a table by Tribal entity. A Tribal entity may be a federally recognized tribe or a constituent component of a federally recognized tribe. For each Tribal entity in the table the total trust acreage is given as well as the breakout of tribal trust and allotted trust acreage. Tribal trust lands are those where a tribe is the named landowner, and the tribe has a full percentage ownership interest in the tract division. Allotted trusts consist of two definitions of allotted. An allotted land may be a land where the tribe is the named landowner but only has a partial percentage interest in the tract division. An allotted land may also be one in which an individual associate of a tribe has any percentage ownership. A trust land would be any tribal, or allotted land that can be tied back the tribal entity. For any regional trust lands that do not have an identified entity interest or have a split entity interest that does not have a clear definition of the split, the trust lands are summarized in a row labeled undesignated. The Land Area Representation (LAR), BIA Regional Boundaries, Regional and BIA offices, as well as tribal entities without land are added in each region and adjacent territories when suitable to provide context. The tribal entity names are given by common use names instead of federal register names and may be further split into subdivisions within the recognized tribe. The Land Area Representation (LAR) is a combined dataset which creates a union of trust lands and reservation extents. The polygons are organized around tribal divisions and groupings and lack disambiguation between the trust land and reservation extent components. Due to the static creation date the LAR may not match different sources for components of the LAR. The Trust Asset and Accounting Management System (TAAMS) which is the system of record for trust lands is the source for records used in acreage calculations. (Last calculated May 2025) Tribal lands are lands where the tribe is the named landowner, and the tribe has a full percentage ownership interest of a tract division. Allotted lands are those in which the tribe is the named landowner but is a partial percentage ownership interest of a tract division, or an allotment may be individually owned by a tribe associate with any percentage ownership interest in a tract division. Trust lands are the summed totals of tribal and allotted interests for a tribal entity. LAR – Land Area Representation is a combined dataset which creates a union of trust lands and reservation extents. The polygons are organized around tribal divisions and groupings and lack disambiguation between the trust land and reservation extent components. TAAMS – The Trust Asset and Accounting Management System which is the system of record for trust land transactions and the source for records used in acreage calculations.,

,Surface trust lands are displayed and summarized in a table by Tribal entity. A Tribal entity may be a federally recognized tribe or a constituent component of a federally recognized tribe. For each Tribal entity in the table the total trust acreage is given as well as the breakout of tribal trust and allotted trust acreage. Tribal trust lands are those where a tribe is the named landowner, and the tribe has a full percentage ownership interest in the tract division. Allotted trusts consist of two definitions of allotted. An allotted land may be a land where the tribe is the named landowner but only has a partial percentage interest in the tract division. An allotted land may also be one in which an individual associate of a tribe has any percentage ownership. A trust land would be any tribal, or allotted land that can be tied back the tribal entity. For any regional trust lands that do not have an identified entity interest or have a split entity interest that does not have a clear definition of the split, the trust lands are summarized in a row labeled undesignated. The Land Area Representation (LAR), BIA Regional Boundaries, Regional and BIA offices, as well as tribal entities without land are added in each region and adjacent territories when suitable to provide context. The tribal entity names are given by common use names instead of federal register names and may be further split into subdivisions within the recognized tribe. The Land Area Representation (LAR) is a combined dataset which creates a union of trust lands and reservation extents. The polygons are organized around tribal divisions and groupings and lack disambiguation between the trust land and reservation extent components. Due to the static creation date the LAR may not match different sources for components of the LAR. The Trust Asset and Accounting Management System (TAAMS) which is the system of record for trust lands is the source for records used in acreage calculations. (Last calculated May 2025) Tribal lands are lands where the tribe is the named landowner, and the tribe has a full percentage ownership interest of a tract division. Allotted lands are those in which the tribe is the named landowner but is a partial percentage ownership interest of a tract division, or an allotment may be individually owned by a tribe associate with any percentage ownership interest in a tract division. Trust lands are the summed totals of tribal and allotted interests for a tribal entity. LAR – Land Area Representation is a combined dataset which creates a union of trust lands and reservation extents. The polygons are organized around tribal divisions and groupings and lack disambiguation between the trust land and reservation extent components. TAAMS – The Trust Asset and Accounting Management System which is the system of record for trust land transactions and the source for records used in acreage calculations.,

,Surface trust lands are displayed and summarized in a table by Tribal entity. A Tribal entity may be a federally recognized tribe or a constituent component of a federally recognized tribe. For each Tribal entity in the table the total trust acreage is given as well as the breakout of tribal trust and allotted trust acreage. Tribal trust lands are those where a tribe is the named landowner, and the tribe has a full percentage ownership interest in the tract division. Allotted trusts consist of two definitions of allotted. An allotted land may be a land where the tribe is the named landowner but only has a partial percentage interest in the tract division. An allotted land may also be one in which an individual associate of a tribe has any percentage ownership. A trust land would be any tribal, or allotted land that can be tied back the tribal entity. For any regional trust lands that do not have an identified entity interest or have a split entity interest that does not have a clear definition of the split, the trust lands are summarized in a row labeled undesignated. The Land Area Representation (LAR), BIA Regional Boundaries, Regional and BIA offices, as well as tribal entities without land are added in each region and adjacent territories when suitable to provide context. The tribal entity names are given by common use names instead of federal register names and may be further split into subdivisions within the recognized tribe. The Land Area Representation (LAR) is a combined dataset which creates a union of trust lands and reservation extents. The polygons are organized around tribal divisions and groupings and lack disambiguation between the trust land and reservation extent components. Due to the static creation date the LAR may not match different sources for components of the LAR. The Trust Asset and Accounting Management System (TAAMS) which is the system of record for trust lands is the source for records used in acreage calculations. (Last calculated May 2025) Tribal lands are lands where the tribe is the named landowner, and the tribe has a full percentage ownership interest of a tract division. Allotted lands are those in which the tribe is the named landowner but is a partial percentage ownership interest of a tract division, or an allotment may be individually owned by a tribe associate with any percentage ownership interest in a tract division. Trust lands are the summed totals of tribal and allotted interests for a tribal entity. LAR – Land Area Representation is a combined dataset which creates a union of trust lands and reservation extents. The polygons are organized around tribal divisions and groupings and lack disambiguation between the trust land and reservation extent components. TAAMS – The Trust Asset and Accounting Management System which is the system of record for trust land transactions and the source for records used in acreage calculations.,

,Surface trust lands are displayed and summarized in a table by Tribal entity. A Tribal entity may be a federally recognized tribe or a constituent component of a federally recognized tribe. For each Tribal entity in the table the total trust acreage is given as well as the breakout of tribal trust and allotted trust acreage. Tribal trust lands are those where a tribe is the named landowner, and the tribe has a full percentage ownership interest in the tract division. Allotted trusts consist of two definitions of allotted. An allotted land may be a land where the tribe is the named landowner but only has a partial percentage interest in the tract division. An allotted land may also be one in which an individual associate of a tribe has any percentage ownership. A trust land would be any tribal, or allotted land that can be tied back the tribal entity. For any regional trust lands that do not have an identified entity interest or have a split entity interest that does not have a clear definition of the split, the trust lands are summarized in a row labeled undesignated. The Land Area Representation (LAR), BIA Regional Boundaries, Regional and BIA offices, as well as tribal entities without land are added in each region and adjacent territories when suitable to provide context. The tribal entity names are given by common use names instead of federal register names and may be further split into subdivisions within the recognized tribe. The Land Area Representation (LAR) is a combined dataset which creates a union of trust lands and reservation extents. The polygons are organized around tribal divisions and groupings and lack disambiguation between the trust land and reservation extent components. Due to the static creation date the LAR may not match different sources for components of the LAR. The Trust Asset and Accounting Management System (TAAMS) which is the system of record for trust lands is the source for records used in acreage calculations. (Last calculated May 2025) Tribal lands are lands where the tribe is the named landowner, and the tribe has a full percentage ownership interest of a tract division. Allotted lands are those in which the tribe is the named landowner but is a partial percentage ownership interest of a tract division, or an allotment may be individually owned by a tribe associate with any percentage ownership interest in a tract division. Trust lands are the summed totals of tribal and allotted interests for a tribal entity. LAR – Land Area Representation is a combined dataset which creates a union of trust lands and reservation extents. The polygons are organized around tribal divisions and groupings and lack disambiguation between the trust land and reservation extent components. TAAMS – The Trust Asset and Accounting Management System which is the system of record for trust land transactions and the source for records used in acreage calculations.,

,Surface trust lands are displayed and summarized in a table by Tribal entity. A Tribal entity may be a federally recognized tribe or a constituent component of a federally recognized tribe. For each Tribal entity in the table the total trust acreage is given as well as the breakout of tribal trust and allotted trust acreage. Tribal trust lands are those where a tribe is the named landowner, and the tribe has a full percentage ownership interest in the tract division. Allotted trusts consist of two definitions of allotted. An allotted land may be a land where the tribe is the named landowner but only has a partial percentage interest in the tract division. An allotted land may also be one in which an individual associate of a tribe has any percentage ownership. A trust land would be any tribal, or allotted land that can be tied back the tribal entity. For any regional trust lands that do not have an identified entity interest or have a split entity interest that does not have a clear definition of the split, the trust lands are summarized in a row labeled undesignated. The Land Area Representation (LAR), BIA Regional Boundaries, Regional and BIA offices, as well as tribal entities without land are added in each region and adjacent territories when suitable to provide context. The tribal entity names are given by common use names instead of federal register names and may be further split into subdivisions within the recognized tribe. The Land Area Representation (LAR) is a combined dataset which creates a union of trust lands and reservation extents. The polygons are organized around tribal divisions and groupings and lack disambiguation between the trust land and reservation extent components. Due to the static creation date the LAR may not match different sources for components of the LAR. The Trust Asset and Accounting Management System (TAAMS) which is the system of record for trust lands is the source for records used in acreage calculations. (Last calculated May 2025) Tribal lands are lands where the tribe is the named landowner, and the tribe has a full percentage ownership interest of a tract division. Allotted lands are those in which the tribe is the named landowner but is a partial percentage ownership interest of a tract division, or an allotment may be individually owned by a tribe associate with any percentage ownership interest in a tract division. Trust lands are the summed totals of tribal and allotted interests for a tribal entity. LAR – Land Area Representation is a combined dataset which creates a union of trust lands and reservation extents. The polygons are organized around tribal divisions and groupings and lack disambiguation between the trust land and reservation extent components. TAAMS – The Trust Asset and Accounting Management System which is the system of record for trust land transactions and the source for records used in acreage calculations.,

The purpose of the American Indian and Alaska Native Land Area Representation (AIAN-LAR) Geographic Information System (GIS) dataset is to depict the external extent of federal Indian reservations and the external extent of associated land held in “trust” by the United States, “restricted fee” or “mixed ownership” status for federally recognized tribes and individual Indians. This dataset includes other land area types such as Public Domain Allotments, Dependent Indian Communities and Homesteads. This GIS Dataset is prepared strictly for illustrative and reference purposes only and should not be used, and is not intended for legal, survey, engineering or navigation purposes. No warranty is made by the Bureau of Indian Affairs (BIA) for the use of the data for purposes not intended by the BIA. This GIS Dataset may contain errors. There is no impact on the legal status of the land areas depicted herein and no impact on land ownership. No legal inference can or should be made from the information in this GIS Dataset. The GIS Dataset is to be used solely for illustrative, reference and statistical purposes and may be used for government to government Tribal consultation. 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 Bureau of Indian Affairs (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. Included in this dataset are the exterior extent of off reservation trust, restricted fee tracts and mixed tracts of land including Public Domain allotments, Dependent Indian Communities, Homesteads and government administered lands and those set aside for schools and dormitories. There are also land areas where there is more than one tribe having an interest in or authority over a tract of land but this information is not specified in the AIAN-LAR dataset. The dataset includes both surface and subsurface tracts of land (tribal and individually held) “off reservation” tracts and not simply off reservation “allotments” as land has in many cases been subsequently acquired in trust. These data are public information and may be used by various organizations, agencies, units of government (i.e., Federal, state, county, and city), and other entities according to the restrictions on appropriate use. It is strongly recommended that these data be acquired directly from the BIA and not indirectly through some other source, which may have altered or integrated the data for another purpose for which they may not have been intended. Integrating land areas into another dataset and attempting to resolve boundary differences between other entities may produce inaccurate results. It is also strongly recommended that careful attention be paid to the content of the metadata file associated with these data. Users are cautioned that digital enlargement of these data to scales greater than those at which they were originally mapped can cause misinterpretation. The BIA AIAN-LAR dataset’s spatial accuracy and attribute information are continuously being updated, improved and is used as the single authoritative land area boundary data for the BIA mission.