MSY
# MSY

MSY or msy can mean:

* Maximum sustainable yield
* IATA airport code for Louis Armstrong New Orleans International Airport
* Merseyside, county in England, Chapman code
* The Mount School, York, United Kingdom
* Motor sailing yacht, a ship prefix for a yacht that can use a motor for propulsion and also sail
* Mulayam Singh Yadav
* Million Species Years, a measurement of Background extinction rate
