The Idaho ground squirrel has been split into the following species:
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Northern Idaho ground squirrel
The northern Idaho ground squirrel (''Urocitellus brunneus'') is a species of the largest genus of ground squirrels. This species and the Southern Idaho ground squirrel were previously considered conspecific, together called the Idaho ground s ...
, ''Urocitellus brunneus''
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Southern Idaho ground squirrel
The southern Idaho ground squirrel (''Urocitellus endemicus'') is a species of the largest genus of ground squirrels. This species and the Northern Idaho ground squirrel were previously considered conspecific, together called the Idaho ground sq ...
, ''Urocitellus endemicus''
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