| Acronym | Definition |
|---|
| AIGA | American Institute of Graphic Arts |
| AIGA | Associazione Italiana Giovani Avvocati (Italy) |
| AIGA | Arizona Indian Gaming Association |
| AIGA | Assistant Inspector General for Audit (US government) |
| AIGA | Alternative Income Generating Activity (various organizations) |
| AIGA | Association Internationale de Geomagnetisme et d'Aeronomie |
| AIGA | Association of International Gospel Assemblies |
| AIGA | Associazione Italiana Giornalisti Ambientalisti |
| AIGA | Advocate Initiatives for Grassroots Access |
| AIGA | Associazione Italiana Gestalt Analitica (Italian Gestalt Association) |