Amn or AMN may refer to:
- Abstract Machine Notation, a formal specification language.
- Alpha motor neuron (α-MNs), large lower motor neurons of the brainstem and spinal cord.
- Access Media Network, technology company founded in 1992 unifying speech, music, images, video and media computer networks with two-way communications.
- Ahli Mangku Negara, a Malaysian honour
- Airman, the second enlisted rank in the United States Air Force, a US Navy rating, or anyone else who works with or manages aircraft
- AMN, a TV station in Griffith, New South Wales, Australia
- Amn (Forgotten Realms), a fictional country in the Forgotten Realms
- AMN Healthcare, Healthcare Services Company
- Amnionless, gene for a protein necessary for efficient absorption of vitamin B12
- Directorate of General Security, also called Amn
- Gratiot Community Airport, Alma, Michigan, United States, from its IATA airport code
- MERCOSUR Standardization Association, from the Spanish-language Asociación MERCOSUR de Normalización
- AMN All Money Necessary, a rap/hiphop artist from Nashville, TN releasing hit single Get'em Gone and Super Soaker off ofmixtape Wow Fam