SEY, Sey or sey may refer to:
Codes SEY, Air Seychelles ICAO airline code SEY, Indian Railways station code for Seoni railway station, Madhya Pradesh SEY, Seychelles IOC country code SEY, Seymour railway station station code sey, Secoya language ISO 639-3 code
People Sey (surname) Sey Chassler (1919–1997), American magazine editor and writer, longtime editor-in-chief of Redbook
See also Seys, a surname