SDH

SDH may refer to:

Biology and medicine

• Serine dehydratase
• Sorbitol dehydrogenase
• L-sorbose 1-dehydrogenase
• Subdural haematoma
• Succinate dehydrogenase

Organizations and places

• St David's Hall
• Social Democrats of Croatia
• Society for Digital Humanities
• Sydney Dental Hospital

Transportation

• Sudbury Hill Harrow railway station, England, National Rail station code

Other

• Shubnikov–de Haas effect
• Social Determinants of Health
• Southern Kurdish, by ISO 639-3 code
• Subtitles for the deaf and hard-of-hearing, a type of closed captioning
• Synchronous digital hierarchy, in telecommunications