Scarborough—Rouge River was a federal electoral district in Ontario, Canada, that has been represented in the House of Commons of Canada between 1988 and 2015. However, as of the Fall 2015 federal election, part of this riding has been combined with the south-western part of the old riding Pickering—Scarborough East. The riding covered the northeast part of the Scarborough part of Toronto. It stretched from Highway 401 in the south to Steeles Avenue in the north. In the east it ended at the border with Pickering and in the west at Midland north of Finch and Brimley south of Finch.