The U.S. Census Bureau has two main programs designed to collect and maintain geographic information on tribal areas: the Boundary and Annexation Survey (BAS) and the Tribal Statistical Areas Program (TSAP). Please see the links below for more information on these programs and American Indian and Alaska Native geography:
Criteria and Guidelines for Tribal Areas in the 2010 Census
Information on the annual program for updating legal boundaries, names and official status of federally recognized American Indian reservation and/or off-reservation trust lands.
Definitions of all Tribal Statistical Entities and information on the 2010 Census program for boundary and name updates for the following entities: