SGN

SGN can refer to:


 * SGN (company), a gas distribution company operating in Scotland and southern England
 * The airport code for Tan Son Nhat International Airport, Ho Chi Minh City, Vietnam
 * The National Rail station code for South Greenford railway station, London, England
 * Sélection de Grains Nobles, a French term for sweet wines made from grapes affected by noble rot
 * Some Good News, a YouTube series
 * Samsung Galaxy Note, a series of mobile phones
 * Seattle Gay News, owner of the sgn.org domain

In mathematics

 * $sgn(x)$, the sign function
 * $sgn(σ)$, the signature of a permutation