A town of Ontario, Canada, capital of Renfrew county, 74 m. W.N.W., of Ottawa by rail on the south shore of Allumette Lake, an expansion of the Ottawa river, and on the Canadian Pacific and Canada Atlantic railways. Pop. (Igor), 5156. It is the seat of a Roman Catholic bishopric, an important centre in the lumber trade, and contains saw, grist and woollen mills, axe factory, &c. The Muskrat river affords excellent water-power.