A30 or A-30 may refer to:
Science
- A30 matriline, the name given to the most commonly seen orca matriline in British Columbia, Canada
- HLA-A30, a human serotype
- A30, ICD10 code for Leprosy and related conditions
Transportation
Air transportation
- Aero A.30, a Czech light bomber developed in the late 1920s
- A-30 Martin Baltimore, an American attack/bomber aircraft
- A30, the IATA location identifier for Scott Valley Airport
Automobiles
- Austin A30, a 1951–1956 British compact car
- Dongfeng Fengshen A30, a 2014–2019 Chinese subcompact sedan
- JAC Heyue A30, 2012–2019 Chinese subcompact sedan
- Aeolus A30, a Chinese saloon
Other
- Cruiser Mk VIII Challenger (A30), a British tank of World War II
- List of A30 roads
Other uses
- Samsung Galaxy A30, smartphone released in 2019
- A30, a code in the Encyclopaedia of Chess Openings for the English Opening
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