CGY

CGY may refer to:


 * Calgary, Alberta, Canada
 * Laguindingan Airport, serving Cagayan de Oro, Mindanao, Philippines, IATA airport code CGY
 * Changanasseri railway station, in Kottayam District, Kerala, India, station code CGY
 * Centigray (cGy), a derived unit of ionizing radiation dose
 * Calian, a Canadian company traded on the Toronto Stock Exchange