The Renault 6 or R6 is an economy C-segment small family car, manufactured and marketed by French automaker Renault from 1968 to 1986. The R6 entirely used the Renault 4's platform, initially including its small 845 cc (51.6 cu in) engine, and was technically near-identical, but its five-door hatchback body was larger and more modern. Visually it resembled the larger Renault 16, but distincly boxier.

The C-segment is the 3rd category of the European segments for passenger cars and is described as "medium cars". It is equivalent to the Euro NCAP "small family car" size class, and the compact car category in the United States.