Atikameksheng Anishnawbek, formerly known as the Whitefish Lake First Nation, is an Ojibway First Nation in northern Ontario, Canada. Atikameksheng Anishnawbek are descendants of the Ojibway, Algonquin and Odawa Nations. Atikameksheng Anishnawbek membership is maintained by the Aboriginal Affairs & Northern Development (AANDC) under Section 11 of the Indian Act.

In 1850, Chief Shawenekezhik on behalf of the Atikameksheng Anishnawbek signed the Robinson-Huron Treaty granting the British Crown and their people (Royal Subjects) a right to occupy and share the lands of the Anishnawbek.