Quemperven (; ) is a commune in the Côtes-d'Armor department of Brittany in northwestern France.
Inhabitants of Quemperven are called quempervennois in French. As of January 1, 2024, the population of Quemperven is 404 people. This figure is based on the 2021 census.
The municipality launched a linguistic plan through Ya d'ar brezhoneg on 7 July 2006.