This map features 85 Russian subdivisions, by their smallest ethnicity. This is based on the ethnic statistics available on Wikipedia, and excludes groups listed as "others".
Map copied from https://www.jetpunk.com/user-quizzes/149667/oblasts-of-russia-with-a-map
All ethnic group names should be listed as a plural. Most of these groups will end in an s, such as Russians, however for some this is not appropriate, such as Chuavsh, which does not change as a plural