DHA, Dha and dha may refer to:

• Docosahexaenoic acid, a 22:6 omega-3 fatty acid
• Dehydroandrosterone, an endogenous androgenic steroid
• Dehydroascorbic acid, an oxidized form of ascorbic acid
• Dehydroacetic acid, a pyrone derivative used as a plasticiser, as a fungicide, as a bactericide, and as a food preservative
• Dihydroxyacetone, the active ingredient in sunless or self-tanning skincare products
• 9,10-Dihydroanthracene, a form of anthracene whose center-ring carbons have been reduced
• Dihydroartemisinin, an antimalarial
• Dihydroalprenolol, a beta-adrenergic blocker
• Dehydroalanine, an uncommon unsaturated α-amino acid

• Defence Housing Australia, a provider of family housing for members of the Australian Defence Forces
• Defence Housing Authority, provides commercial and residential housing developments for the Pakistani army
  • Defence Housing Authority, Islamabad
  • Defence Housing Authority, Karachi
• Defense Health Agency, the United States Department of Defense agency responsible for managing the activities of the Military Health System
• Department of Humanitarian Affairs, now known as the United Nations Office for the Coordination of Humanitarian Affairs
• DHA Cinema, a movie theatre in Lahore, Pakistan
• District health authority, a former type of administrative organisation of the NHS in England and Wales
• Drug Houses of Australia, a Singapore pharmaceuticals manufacturer
• Demirören Haber Ajansı (Demirören News Agency), a Turkish news agency

• Dha (Indic), a glyph in the Brahmic family of script
• Dha (Javanese) (ꦝ), a letter in the Javanese script

• Dha, Ladakh, a village in the Leh district of India.
• Dhahran International Airport, military airbase in Dhahran, Saudi Arabia
• Dha (sword), a single-edged weapon found in Burma/Myanmar, Thailand and other parts of Southeast Asia
• Directory Harvest Attack, a method used by spammers to obtain email addresses
• Disarmament as Humanitarian Action, a research project carried out at the United Nations Institute for Disarmament Research
• Doctor of Health Administration, a doctoral degree
• D.Ha., an abbreviation used for the United States District Court for the District of Hawaii

This disambiguation page lists articles associated with the title DHA.
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