AMX may refer to:
- AMX LLC, a manufacturer of commercial and residential control systems
- The AMX, a sports car made by American Motors Corporation (AMC)
- América Móvil, Mexican telecommunications company
- The AMX International AMX, a fighter aircraft
- AMX International, the company that makes the AMX aircraft
- Armored Vehicles produced by GIAT Industries of France - from Atelier de Construction d'Issy-Les-Molineaux
- AMX 50 - heavy tank
- AMX 30 - main battle tank
- AMX 13 - light tank
- AMX 10 RC - armored fighting vehicle
- AMX 56 - main battle tank better known as Leclerc
- AMX Mod, a server-side modification for Half-Life games
- AMX192, a lighting control standard
- AMX-4, a GE Healthcare mobile X-Ray System
- Amakusa Airlines
As a three-letter abbreviation with multiple meanings:
- AMX index, (Amsterdam Midkap Index) a stock market index of Euronext Amsterdam
- AMX - Aeroméxico's ICAO airline designator
- AMX - Appserver Management eXtensions (a JMX proxy layer in the GlassFish application server)