12A may refer to:
- Media content ratings including the following:
- 12A issued by the British Board of Film Classification
- PG-12, the forerunner to the 12A classification, documented at History of British film certificates
- 12A issued by the Irish Film Classification Office
- 12A issued in Malta and Nigeria, documented at Motion picture content rating system
- 12A issued by the British Board of Film Classification
- A type of Mazda Wankel engine
- Any of the several highways numbered 12A