CIE may refer to:
Cierra Alexa Ramírez (born March 9, 1995) is an American actress, model and singer. She may be best known for her role as Mariana Adams-Foster in the long running television series The Fosters.
Cienfuegos (American Spanish: [sjeɱˈfweɣos]), capital of Cienfuegos Province, is a city on the southern coast of Cuba.
The Cierva C.30 was an autogyro designed by Juan de la Cierva and built under licence from the Cierva Autogiro Company by A V Roe & Co Ltd (Avro), Lioré-et-Olivier and Focke-Wulf.
Cieszyn [ˈt͡ɕɛʂɨn] (Czech: Těšín, German: Teschen, Silesian: Ćeszyn, Yiddish: טעשין, Teschin, Latin: Tessin) is a border-town in southern Poland on the east bank of the Olza River, and the administrative seat of Cieszyn County, Silesian Voivodeship.
Ciena Corporation is a United States-based global supplier of telecommunications networking equipment, software and services that support the delivery and transport of voice, video and data service.
Club Sportivo Cienciano is a professional football club based in Cusco, Peru. The club was founded in 1901 and was originally the team of the Faculty of Science of the University of Cusco (Ciencias meaning science in Spanish), from which it takes its name.