CEN may refer to: Centinela State Prison in California, USA Central Station, Hong Kong; MTR station code CEN Centralia, Illinois (Amtrak station), United States; Amtrak station code CEN Centre d'Etude Nucléaire (CEN in French) Ciudad Obregón International Airport (IATA code: CEN) Creative Environmental Networks European Committee for Standardization (Comité Européen de Normalisation in French) SCK•CEN: The Belgian nuclear research institute (Centre d'Étude… (More on Cen)