Amn or AMN may refer to:
Biology Alpha motor neuron (α-MNs), large lower motor neurons of the brainstem and spinal cord Amnionless, a gene for a protein necessary for efficient absorption of vitamin B12 Adrenoleukodystrophy, a rare X-linked genetic disease
Media companies AMN (TV station), in Griffith, New South Wales, Australia Access Media Network, a communications media company Al-Masdar News, a multilingual news website All Media Network, a former music, movie and game database company acquired by RhythmOne
Military and politics Afghanistan Mission Network, a coalition network for NATO led missions in Afghanistan Airman, a low-grade enlisted rank in the US armed forces Directorate of General Security, Arabic name of former Iraqi intelligence agency Alianţa Moldova Noastră, a former social-liberal political party in Moldova
Other uses Amn (Forgotten Realms), a fictional country in Dungeons & Dragons Ahli Mangku Negara, a Malaysian honour Ainsley Maitland-Niles, a professional footballer Gratiot Community Airport, Alma, Michigan, US (IATA code AMN)