The River Rouge, also known as the Rouge River, is a 127 mile river in the Metro Detroit area of southeastern Michigan. It flows into the Detroit River at Zug Island, which is the boundary between the cities of River Rouge and Detroit.

River Rouge is a city in Wayne County in the U.S. state of Michigan and an industrial Downriver suburb of Detroit. The population was 7,903 at the 2010 census. It is named after the River Rouge (or Rouge River from the French "rouge" meaning red), which flows along the city's northern border and into the Detroit River. The city includes the heavily industrialized Zug Island at the mouth of the River Rouge.