MSY
MSY stands for:
- Maximum Sustainable Yield (Eng. "Maximum sustainable yield"), with regard to fishing see catch quota
- Motor Sailing Yacht, name addition or prefix in ship names for motor sailing yachts
- Louis Armstrong New Orleans International Airport (IATA code), American airport
- Massey University School of Aviation (ICAO code), New Zealand airline of Massey University
- Soyen station (DS100 code), Rosenheim district, Bavaria
msy stands for: