The Census 2000 data on American Indian and Alaska Native tribes were taken from the question on race that was asked of all people. Respondents were allowed to mark one or more races, and to write in one or more tribes. Tribal information reflects the written entries reported on the questionnaire and was based on self-identification.
A response accepted as a specific American Indian tribe includes entries such as Fort Sill Apache, Blackfeet, Canadian Indian, Comanche, Navajo, and Shawnee. Additionally, some entries (e.g., Colorado River, Iroquois, Sioux, and United Houma Nation) represent nations or reservations. A response accepted as a specific Alaska Native tribe includes entries such as Aleut, Calista, Inuit, Kwiguk, and Tsimshian. The information on tribe does not reflect any designation of federally or state-recognized tribe. Census 2000 data on tribes may differ from other sources, such as tribal governments and the Bureau of Indian Affairs within the Department of Interior.
The numbers shown for the total American Indian or Alaska Native tribe alone category include people who reported only as American Indian or Alaska Native either by marking the American Indian or Alaska Native response category, but did not write-in a specific tribe; or by writing in one or more American Indian or Alaska Native tribe. Respondents who reported two or more American Indian or Alaska Native tribes within a specific common code range, but no other race are included in the alone category. Hence, the number shown for the tribal grouping may not equal the sum of the individual tribes. For example, a respondent who reported as Fort Sill Apache was counted one time in the Fort Sill Apache tribe only, and one time in the Apache alone tribal grouping. A respondent who reported Fort Sill Apache and Mescalero Apache is counted once in the Apache alone tribal grouping. These tabulations represent the minimum number of people who reported a specific American Indian or Alaska Native tribe alone.
The numbers shown for the American Indian or Alaska Native tribe alone or in any combination category is a tally of respondents who reported one or more American Indian or Alaska Native tribe(s) and one or more races. For example, a respondent who reported as "Navajo and Fort Sill Apache and White" was included in the "Navajo alone or in any combination" category, once in the Fort Sill Apache alone or in any combination category, and once in the "Apache tribal grouping alone or in any combination" category. These numbers represent the maximum number of respondents for any given combination of tribe. This presentation may add to more than the total population because people are included in more than one category.