The acronym OHA may refer to:

• On hand Always
• DHS Office of Health Affairs, an office in the United States Department of Homeland Security
• Oakland Heritage Alliance, a non-profit preservation organization in Oakland, California.
• Oakland Housing Authority
• Office of Hawaiian Affairs
• Office of Hearings and Appeals, within the US Small Business Administration
• Office of Human Affairs, a Community Action Agency serving the residents of Newport News and Hampton, Virginia.
• Oklahoma Hospital Association, the state affiliate of the American Hospital Association
• Omaha Housing Authority, the government agency responsible for providing public housing in Omaha, Nebraska, USA
• Ontario Hockey Association, which governs most junior and senior hockey in Ontario
• Ontario Horticultural Association
• Ontario Hospital Association
• Open Handset Alliance, a consortium of companies dedicated to producing an open standard for mobile devices.
• Oral hypoglycemic agents, the majority of anti-diabetic drugs
• Oral Health America
• Oregon Health Authority
• Ormiston Horizon Academy
• Oral History Association, a professional association for oral historians
• Overseas housing allowance (United States military)
• RNZAF Base Ohakea, New Zealand, which uses IATA code OHA

Oha may refer to:

• Õha, village in Kaarma Parish, Saare County, Estonia
• Ugo Oha, a Nigerian basketball player
• Ofe Oha, a Nigerian soup

• Okha, Russia, town in Russia

This disambiguation page lists articles associated with the title OHA.
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