9H or 9-H can refer to:
- 9H, IATA code for Dutch Antilles Express
- 9H, see London Buses route 9 (Heritage)
- New York State Route 9H
- N-9H, a model of Curtiss Model N
- WAG-9H, a model of Indian locomotive class WAG-9
- 9H, National aircraft registration prefix for Malta
- The highest pencil hardness grade
See also
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