| Acronym | Definition |
|---|
| IPA | Internet Protocol Address |
| IPA | Interim Payment Agreement (finance) |
| IPA | Information-Technology Promotion Agency (Japan) |
| IPA | India Pale Ale (beer) |
| IPA | International Phonetic Alphabet |
| IPA | International Phonetic Association |
| IPA | Institute of Practitioners in Advertising |
| IPA | Independent Practice Association |
| IPA | International Police Association |
| IPA | Institute for Public Accuracy |
| IPA | Isopropyl Alcohol |
| IPA | International Publishers Association |
| IPA | Intergovernmental Personnel Act |
| IPA | Institute for Public Administration |
| IPA | Institut für Produktionstechnik und Automatisierung (Fraunhofer Gesellschaft) |
| IPA | Institute of Public Administration (various countries) |
| IPA | Innovations for Poverty Action (New Haven, CT) |
| IPA | Individual Practice Association |
| IPA | International Pharmaceutical Abstracts |
| IPA | International Photography Awards |
| IPA | International Psychoanalytical Association |
| IPA | Investment Promotion Agency |
| IPA | Investor Protection Association |
| IPA | International Press Association |
| IPA | International Permafrost Association |
| IPA | Idrocarburi Policiclici Aromatici (Italian: Polycyclic Aromatic Hydrocarbons) |
| IPA | International Peace Academy |
| IPA | International Psychogeriatric Association |
| IPA | Institute for Public Affairs |
| IPA | Independent Physician Association |
| IPA | Inter Partner Assistance (Poland) |
| IPA | Indonesian Petroleum Association (Jakarta, Indonesia) |
| IPA | Interpretative Phenomenological Analysis |
| IPA | Intelligent Parking Assist |
| IPA | Independent Physicians Association |
| IPA | Illustrators' Partnership of America |
| IPA | Iso-Propyl Alcohol |
| IPA | International Press Academy |
| IPA | Independent Public Accountant |
| IPA | Isopropyl Acetate |
| IPA | Insolvency Practitioners Association (UK) |
| IPA | Isophthalic Acid |
| IPA | Independent Press Association |
| IPA | Independent Pilots Association |
| IPA | International Profit Associates, Inc. |
| IPA | Income Protection Allowance (student financial aid) |
| IPA | Indian Ports Association |
| IPA | Intermountain Power Agency |
| IPA | International Prepress Association |
| IPA | International Pediatric Association |
| IPA | Intermediate Power Amplifier |
| IPA | Internet Poetry Archive |
| IPA | International Priority Airmail (USPS) |
| IPA | Intergovernmental Personnel Agreement |
| IPA | Independent Provider Association |
| IPA | Investment Program Association (Ellicott City, MD) |
| IPA | Interagency Personnel Agreement |
| IPA | International Platinum Association |
| IPA | Inland Press Association |
| IPA | Independent Program Assessment |
| IPA | International Platform Association |
| IPA | Island Pacific Academy (Kapolei, Hawaii school) |
| IPA | Indian Patents Act (1970) |
| IPA | Industrial Property Act |
| IPA | International Presentation Association |
| IPA | Indiana Percussion Association |
| IPA | Institut Pasteur d'Algérie (French) |
| IPA | Information Processing Association |
| IPA | Individuelle Praktische Arbeiten |
| IPA | Indiana Pharmacists Alliance |
| IPA | International Professional Pool Players Association |
| IPA | Fraunhofer Institut für Produktionstechnik und Automation |
| IPA | Internet Page Accelerator (Starband) |
| IPA | Initial Performance Assessment |
| IPA | Interagency Personnel Act |
| IPA | Involvement Participation Association |
| IPA | Image Product Archive (now Image Product Library) |
| IPA | Independent-Particle Approximation |
| IPA | Independent Program Administrator (drug program chief, baseball) |
| IPA | Interface Propagation Analysis |
| IPA | International Playground Association (UK) |
| IPA | International Project Aid (Zurich, Switzerland) |
| IPA | Innocence Protection Act of 2001 |
| IPA | Integrated Program Assessment |
| IPA | Israel Psychological Association |
| IPA | Ilonggo Producers Association (Philippines) |
| IPA | Ingineria Produselor Alimentare (Romania) |
| IPA | Instituto Português de Arquelogia (Portuguese Institute of Archeology) |
| IPA | Ideal Point Analysis |
| IPA | Isolated Post Allowance (Canadian Forces) |
| IPA | intelligence production agency (US DoD) |
| IPA | Independent Path Algorithm |
| IPA | Instant Pre-Approval (mortgage banking) |
| IPA | Income Property Association (San Rafael, CA) |
| IPA | Institute for Procurement Assistance |
| IPA | Information Processing Activity |
| IPA | Iraqi Police Advisor |
| IPA | Infinite Periodic Array |
| IPA | Industrial Property Account |
| IPA | Interstate Pistol Association (competitive shooters upstate NY and PA) |
| IPA | Indy Pets Alive (Indianapolis Pet Coalition) |
| IPA | Inter-Period Allocation |
| IPA | Independent Public Agent (US government) |
| IPA | Inventor's Protection Act of 1999 |
| IPA | In-Principle Approval (Singapore) |
| IPA | International Paruresis Association (Baltimore, MD) |
| IPA | International Probationary Association (Bangalore, India) |
| IPA | International Patent Application |
| IPA | Image Processing Algorithm |
| IPA | Information Privacy Act (various locations) |
| IPA | Income Producing Asset |
| IPA | Instrument for Pre-Accession Assistance (EU) |
| IPA | Information Protection Act (various locations) |
| IPA | Indian Plumbing Association (est. 1993) |
| IPA | Indonesian Professionals Association (est. 1991) |
| IPA | Industry Partner Alliance (American Society of Association Executives) |