DDH may refer to:
1,3-Dibromo-5,5-dimethylhydantoin, a chemical also abbreviated as DBDMH Ddh (trigraph), a trigraph used in the Dene Suline language for the dental affricate /tθ/ De Danske Husmoderforeninger, Danish women's organization Decisional Diffie–Hellman assumption Department of Digital Humanities, at King's College London (formerly Centre for Computing in the Humanities) Developmental Dysplasia of the Hip, see Hip dysplasia (human) Devonshire Dock Hall, the BAE Systems assembly facility Disciples Divinity House, Christian seminary of the University of Chicago DDH is hull classification symbol for helicopter carrier or helicopter destroyer