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