A14 may refer to:
- Aero A.14, a Czech reconnaissance aircraft built after World War I
- Anatomical Therapeutic Chemical (ATC) Classification System 14 (ATC code A14) Anabolic agents for systemic use, a subgroup of the ATC Classification System
- Apple A14 Bionic processor, designed by Apple and used in the iPad Air (2020), iPhone 12 and iPhone 12 Pro.
- British NVC community A14 (Myriophyllum alterniflorum community), a British Isles plant community
- Curtiss XA-14 Shrike, a 1930s-era ground-attack airplane
- English Opening, Encyclopaedia of Chess Openings code
- Fiat A.14, a 1917 Italian 12-cylinder, liquid-cooled, V aero engine
- HMNZS Resolution (A14), a 1989 hydrographic ship of the Royal New Zealand Navy
- HMS A.14, an alternate name for HMS B1, a submarine of the British Royal Navy
- Nissan A14, a 1975–2008 car engine
- Samsung Galaxy A14, an Android smartphone series by Samsung Electronics.