9H

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