ABX may refer to:
- ABX test, a double-blind testing method commonly used in codec listening tests and in ascertaining high fidelity
- Abaknon language, an Austronesian language of the Philippines
- Albury Airport in Albury, New South Wales, Australia, from its IATA airport code
- Barrick Gold, from its TSX and NYSE stock symbol
- Antibiotics, antibacterial medications
- ABX Air
- An asset-backed securities index
- ABX diagnostics, a medical device manufacturer, which was acquired by Horiba