Kenora—Rainy River was a federal electoral district represented in the House of Commons of Canada from 1925 to 2004.

It initially consisted of the parts of the territorial districts of Kenora and Rainy River lying west of the fifth meridian passing between the townships of Melgund and Revell.

In 1933, it was redefined as consisting of the part of the province of Ontario lying west of the fourth meridian including Sioux Lookout, Ignace and Atikokan.

In 1966, it was redefined as consisting of the western parts of the territorial districts of Rainy River and Kenora west of a line drawn (from south to north) beginning at the Duluth, Winnipeg and Pacific Railway bridge and ending at the northern limit of the province.

In 1976, it was redefined as consisting of the western parts of the Territorial Districts of Kenora, Rainy River and Thunder Bay.