Wemotaci is a First Nations reserve on the north shore of the Saint-Maurice River at the mouth of the Manouane River in the Mauricie region of Quebec, Canada. Together with the Obedjiwan and the Coucoucache Indian Reserve No. 24, it belongs to the Atikamekw First Nation. The reserve, an enclave within the city of La Tuque, is bordered to the west and south by the Saint-Maurice River, whereas its eastern boundary is about 3.8 kilometres long, and its northern boundary is 7.8 kilometres.