MGN

MGN can refer to:


 * Marine Guidance Notes, by UK Maritime and Coastguard Agency
 * National Rail station code for Marston Green railway station, UK
 * Mirror Group Newspapers, UK, now part of Trinity Mirror
 * Medial geniculate nucleus, a subnucleus of the thalamus in the brain
 * Membranous glomerulonephritis, a kidney disease
 * Former UK Midland and Great Northern Joint Railway
 * Mouettes Genevoises Navigation, public transportation by boat in Geneva, Switzerland