QuempervenQuemperven is a commune in the Côtes-d'Armor department of Brittany in northwestern France.WWW quemperven.frPopulationInhabitants 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.Breton languageThe municipality launched a linguistic plan through Ya d'ar brezhoneg on 7 July 2006.