CDH may refer to:
- CDH Investments, a Chinese asset management firm
- Central DuPage Hospital, Illinois, U.S.A.
- Centre Démocrate Humaniste, a Belgian political party
- Cloudera's Distribution including Apache Hadoop
- The Computational Diffie-Hellman assumption, that a certain mathematical problem is hard
- Congenital diaphragmatic hernia
- Cretin-Derham Hall, school in St. Paul, Minnesota, U.S.A.
- Cellobiose dehydrogenase, a plant enzyme
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