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
 * Synchronous digital hierarchy, in telecommunications