Sioux Narrows-Nestor Falls is a township in the Canadian province of Ontario, located in the Kenora District. It is located on the eastern shores of Lake of the Woods along Ontario Highway 71. The township was formed in 2001 by amalgamating the formerly incorporated Township of Sioux Narrows with portions of Unorganized Kenora District, including the community of Nestor Falls. The township had a population of 720 in the Canada 2011 Census.