| Acronym | Definition |
|---|
| OIA➣Office of International Affairs |
| OIA➣Outdoor Industry Association |
| OIA➣Only in America |
| OIA➣Official Information Act (New Zealand Parliament) |
| OIA➣Orlando International Airport |
| OIA➣Organize It All (various organizations) |
| OIA➣Oracle Identity Analytics (software) |
| OIA➣Organization of Independent Artists (New York) |
| OIA➣Oahu Interscholastic Association |
| OIA➣Operator Information Area |
| OIA➣O Instituto Ambiental (Portuguese: The Environmental Institute) |
| OIA➣Organización Internacional Agropecuaria (Spanish: International Agriculture Organization; Argentina) |
| OIA➣Office of International Activities (EPA) |
| OIA➣Oregonians in Action |
| OIA➣Office of Internal Audit (government) |
| OIA➣Office of Internal Affairs |
| OIA➣Organización Indígena de Antioquía (Spanish: Indigenous Organization of Antioquia; Antioquia, Columbia) |
| OIA➣Office of Indian Affairs |
| OIA➣Old Indo-Aryan (linguistics) |
| OIA➣Ono International Association (Japan) |
| OIA➣Open Intelligence Agency |
| OIA➣Opportunity International Australia |
| OIA➣Organización Israelita Argentina (Peronist Jewish organization in the late 1940s and early 1950s) |
| OIA➣Office of Imagery Analysis (CIA) |
| OIA➣Office of the Assistant Secretary for Information Analysis |
| OIA➣Outerworld Investigation Agency (gaming, Mortal Kombat Special Forces Organization) |
| OIA➣Operational Impact Assessment (military rating of the impact of testing failures) |
| OIA➣Office of Instructional Assistance |
| OIA➣Old Ignatian Association |
| OIA➣Oceanic Industries Association |
| OIA➣Out in Albuquerque (Albuquerque, NM) |
| OIA➣Order of Independent Americans |