CSY

CSY may refer to:

• CSY is the ICAO airline designator for Shuangyang General Aviation Company, China
• CSY is the IATA airport code for Cheboksary Airport, Russia
• CSY is the National Rail station code for Coseley railway station, England
• Central Siberian Yupik language, one of the four Yupik languages. It is spoken also on St. Lawrence Island

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