The Aven (French pronunciation: [avɛn]) is a natural watercourse on the south coast of Brittany, France.

It flows in a generally southerly direction through Rosporden and Pont-Aven before discharging into the Atlantic Ocean at the seaside resort Port Manec'h, part of Névez.

Paul Gauguin spent some of his life living in the town of Pont-Aven, where he enjoyed painting scenes by the river Aven.

The water quality has been tested as slightly alkaline with a pH of 8.50 (at a location in Pont-Aven) where Gauguin was known to have painted his noted Lavenders (Lumina Tech, 2006).

The waters are relatively clear with Secchi disc tests at Pont-Aven yielding a measurement of 65 centimetres.