MSN usually refers to an online service formerly known as the Microsoft Network. It may refer to:

• Dane County Regional Airport (IATA: MSN) in Madison, Wisconsin
• Master of Science in Nursing
• Maquila Solidarity Network
• Meeker Southern Railroad (AAR reporting marks MSN)
• Windows Live Messenger, previously known as MSN Messenger
• Multiple Subscriber Number

This disambiguation page lists articles associated with the same title. If an internal link led you here, you may wish to change the link to point directly to the intended article.